;
- novel written in epistolary style
- novelette
- novelist
- novelists
- novelization
- novella
- novels or plays about the merchant class
- novelty
- novennial
- novice
- now
- now ...
- now I remember
- now advancing and now retreating
- now and anciently
- now and then
- now at last
- now is the time
- now mainly decorative
- now on sale
- now or never
- now rejoicing
- now that
- now that it has come to this
- now that it is as such
- now that you mention it
- now that you mention it ...
- now that you say that
- now used for the subtitles and captions themselves
- now watching
- now worrying
- now-now-ism
- nowadays
- nowhere
- nowhere in particular
- nowhere to be seen
- noxious gas
- noxious gas originally believed to cause fever
- noxious insect
- noxious plant
- noxious stimuli
- noxious stimulus
- nozzle
- ns
- nu
- nuance
- nub
- nubuck
- nucellus
- nucha
- nuclear
- nuclear accident
- nuclear allergy
- nuclear arms
- nuclear arsenal
- nuclear astrophysics
- nuclear attack
- nuclear bomb shelter
- nuclear bonding
- nuclear chemistry
- nuclear club
- nuclear crisis
- nuclear decay
- nuclear defences
- nuclear defenses
- nuclear deterrence
- nuclear deterrent force
- nuclear deterrent theory
- nuclear development
- nuclear development program
- nuclear disarmament
- nuclear disaster
- nuclear disposal
- nuclear energy
- nuclear energy property insurance
- nuclear engineering
- nuclear explosion
- nuclear facility
- nuclear family
- nuclear family in the postwar generation
- nuclear fission
- nuclear force
- nuclear fuel cycle
- nuclear fuel reprocessing
- nuclear fuel rod
- nuclear fuel storage pool
- nuclear fusion
- nuclear fusion reactor
- nuclear icterus
- nuclear installation
- nuclear issue
- nuclear laboratory
- nuclear magnetic resonance
- nuclear magnetic resonance imaging
- nuclear magneton
- nuclear medicine
- nuclear membrane
- nuclear missile
- nuclear nonproliferation
- nuclear phase
- nuclear physicist
- nuclear physics
- nuclear power
- nuclear power facility
- nuclear power generation
- nuclear power plant
- nuclear power reactor
- nuclear power station
- nuclear power-plant crisis
- nuclear problem
- nuclear program
- nuclear proliferation
- nuclear reaction
- nuclear reactor
- nuclear reactor core
- nuclear reactor core meltdown
- nuclear reprocessing plant
- nuclear rod
- nuclear science
- nuclear scientist
- nuclear ship
- nuclear state
- nuclear stockpile
- nuclear strategy
- nuclear strike
- nuclear submarine
- nuclear terrorism
- nuclear test
- nuclear transplantation
- nuclear umbrella
- nuclear warfare
- nuclear warhead
- nuclear waste
- nuclear watchdog
- nuclear weapon
- nuclear weapon free
- nuclear weaponry
- nuclear weapons
- nuclear winter
- nuclear-powered aircraft carrier
- nuclear-powered satellite
- nuclear-weapon state
- nuclease
- nucleic acid
- nucleolus
- nucleon
- nucleon structure
- nucleonics
- nucleoprotein
- nucleoside
- nucleosome
- nucleotide
- nucleus
- nucleus accumbens
- nuclide
- nude
- nude idol
- nude model
- nude mouse
- nude photo
- nude photograph showing pubic hair
- nude studio
- nude woman
- nudibranch
- nudie
- nudism
- nudist
- nudity
- nudnik
- nugget
- nuisance
- nuisance call
- nuisance mail
- nuisance phone call
- nuisance to other people
- nuisance to people around one
- nuke
- null
- null address
- null byte
- null character
- null character string
- null factor
- null field
- null hypothesis
- null list
- null modem
- null pattern
- null pointer
- null pointer exception
- null set
- null space
- null string
- null type
- null value
- nulla poena sine lege
- nullification
- numb
- numbat
- number
- number crossword
- number display
- number eight
- number enclosed within a circle
- number line
- number of articles
- number of babies born
- number of births
- number of blows
- number of books
- number of cases
- number of characters
- number of characters or letters
- number of colors
- number of copies printed
- number of crimes
- number of days old
- number of days one has attended
- number of days since the new moon
- number of days spent in hospital
- number of deaths
- number of decimal places
- number of dependents
- number of digits or characters
- number of elements
- number of events
- number of flight hours
- number of hits
- number of hours
- number of hours worked
- number of households
- number of houses
- number of individuals
- number of items
- number of large objects such as cars
- number of lines
- number of long thin objects
- number of moves
- number of nights
- number of nights staying in accommodation
- number of occurances
- number of pages
- number of people
- number of people to be admitted or accepted
- number of persons
- number of phrases
- number of pips visible after a throw of the dice
- number of punches
- number of pupils
- number of revolutions
- number of rooms
- number of rotations
- number of soldiers
- number of stairs or stories
- number of steps
- number of straw bags
- number of strokes in character
- number of subscribers
- number of tatami
- number of times
- number of votes obtained
- number of votes polled
- number of ways
- number of words
- number of words a person speaks
- number of years
- number on player's back
- number one
- number one in Japan
- number or size of periodicals or pictures
- number plate
- number portability
- number printed
- number representation
- number representation system
- number sign
- number system
- number theory
- number token
- number two
- number-crunching
- number-juggling
- number-withheld phone calls
- numbered tag or ticket
- numbered ticket
- numbering
- numbering machine
- numbering of years since Jimmu
- numbering plan
- numbers
- numbers of members
- numbness
- numbskull
- numeral
- numeration
- numeration system
- numerator
- numeric
- numeric OR address
- numeric calculation
- numeric character
- numeric character reference
- numeric character set
- numeric code
- numeric coded set
- numeric conversion
- numeric data
- numeric data processor
- numeric format
- numeric item
- numeric keypad
- numeric keypad lock
- numeric literal
- numeric operation
- numeric parameter
- numeric representation
- numeric type
- numeric user identifier
- numeric variable
- numeric word
- numerical
- numerical analysis
- numerical aperture
- numerical calculation
- numerical control
- numerical expression
- numerical formula
- numerical inferiority
- numerical musical notation
- numerical notation
- numerical strength
- numerical superiority
- numerical value
- numerically inferior force
- numerics
- numerology
- numerous
- numismatics
- numismatist
- nummulite
- numnah
- nun
- nun in charge of a Buddhist convent
- nunchak
- nunchaku
- nunnery
- nuptial coloration
- nuptial procession
- nuptials
- nurse
- nurse bank
- nurse call
- nurse practitioner
- nurse shark
- nurse station
- nurse-teacher
- nursehound
- nursemaid
- nursery
- nursery rhyme
- nursery school
- nursery tale
- nursery-tale
- nurseryman
- nurses' school
- nurses' training school
- nursing
- nursing a patient
- nursing art
- nursing baby
- nursing care authorization
- nursing care center
- nursing care centre
- nursing care level
- nursing fatigue
- nursing home
- nursing in the home by visiting nurses
- nursing insurance
- nursing mother
- nursing science
- nursing time
- nursing-care insurance system
- nursing-care service
- nurture
- nurturing
- nut
- nut allergy
- nut grass
- nut oil
- nutcracker
- nutcrackers
- nutmeg
- nutria
- nutrient
- nutrient agar
- nutrient-rich lake
- nutriment
- nutrition
- nutritional science
- nutritional supplement
- nutritional supplement drink
- nutritional value
- nutritionist
- nutritious substance
- nutritive material
- nutritive salts
- nuts
- nuts!
- nvCJD
- nylon
- nylon latch
- nylon stockings
- nylon track pants
- nylon track suit
- nylons
- nymph
- nymphalid
- nymphet
- nymphomania
- nymphomaniac
- nyquist filter
- nystagmus
- o
- o [オー]
- o'clock
- oaf
- oak
- oak flour
- oak-tree
- oaks
- oakum
- oar
- oarfish
- oars
- oarsman
- oasis
- oat
- oatcake
- oath
- oath signed in blood
- oatmeal
- oatmeal cookie
- oats
- obbligato
- obdurate
- obedience
- obedience and disobedience
- obedient
- obedient plant
- obediently
- obelisk
- obese
- obesity
- obeying
- obeying meekly
- obeying the law
- obfuscated style of Japanese text
- obfuscation
- obi
- obi cloth or material
- obi for men's use
- obi sash
- obi that is not tied but merely wrapped around the body
- obi with a different colour on each side
- obi worn high on the waist
- obi-tying ceremony designed to ensure safe birth of a child
- obituary
- obituary notice
- object
- object at rest
- object being examined
- object being sought
- object browser
- object capacity
- object class
- object class description
- object code
- object computer entry
- object cut off at the end
- object d'art
- object database management system
- object description
- object descriptor type
- object file
- object identifier
- object identifier type
- object language
- object left in a person's charge
- object lesson
- object library
- object model diagram
- object modeling tool
- object modification
- object module
- object of a verb
- object of adoration
- object of an application
- object of desire
- object of entry
- object of romantic interest
- object of worship
- object of worship housed in a Shinto shrine and believed to contain the spirit of a deity
- object or animal occupied by a kami
- object or shape that symbolizes the vow of a buddha or bodhisattva to save all life
- object oriented database
- object placed in tokonoma
- object program
- object representative of a divine spirit
- object set aside or held in reserve
- object technology
- object time
- object to be examined
- object to which a spirit is drawn or summoned
- object type
- object which conceals the head of a nail
- object which is mixed in
- object-computer
- object-oriented
- object-oriented database
- object-oriented graphics
- object-oriented interface
- object-oriented language
- object-oriented programming
- objection
- objectionable literature
- objective
- objective case
- objective complement
- objective idealism
- objective lens
- objective point of view
- objective symptoms
- objectivism
- objectivist
- objectivity
- objectivization
- objects bought but never used
- objects crowded together
- objet d'art
- oblate
- oblate spheroid
- oblateness
- oblation
- obligation
- obligation of restitution
- obligatory
- obligatory-gift chocolate
- obliged
- obliged to
- obliging person
- oblique
- oblique butterflyfish
- oblique case
- oblique incidence
- oblique line
- oblique prism
- oblique projection
- oblique stress
- obliquely
- obliqueness
- obliqueness command
- obliqueness hierarchy
- obliteration
- oblivion
- oblivious of
- oblivious to the convenience of others
- oblong
- oblong brazier
- oboe
- oboe d'amore
- obscene
- obscene book
- obscene shirt
- obscenity
- obscurantism
- obscure
- obscurity
- obscurity of a forest
- obsequious person
- observance
- observance of the Buddha's teachings
- observance of the Buddhist precept of lifelong celibacy
- observation
- observation and contemplation
- observation balloon
- observation car
- observation deck
- observation diary
- observation helicopter
- observation meditation
- observation network
- observation point
- observation post
- observation results
- observation ship
- observation tour
- observation tower
- observational study
- observatory
- observatory for astronomy
- observed data
- observed holiday
- observed value
- observer
- observing
- observing a performance in a large group
- observing closely
- observing eye
- observing the precepts
- obsession
- obsession with changing one's appearance
- obsession with cleanliness
- obsessional neurosis
- obsessive-compulsive disorder
- obsessively trend-conscious teen-age girls
- obsidian
- obsolescent
- obsolescent feature
- obsolete
- obsolete article
- obsolete element
- obsolete in 757 when Izumi was established as a separate province from Kawachi
- obsolete rule prohibiting match-ups between sumo wrestlers from the same group of stables
- obsolete unit of luminous intensity
- obsolete word
- obsoleting indication
- obstacle
- obstacle race
- obstacle to Buddhist practice
- obstetric analgesia for labor
- obstetric care
- obstetrician
- obstetrician and gynecologist
- obstetrics
- obstinacy
- obstinacy of old age
- obstinate
- obstinate and bigoted
- obstinate and foolish
- obstinate and self-assertive
- obstinate insistence
- obstinate person
- obstipant
- obstreperous
- obstructing a view
- obstruction
- obstruction guard
- obstruction of proceedings
- obstructive
- obstructive tactics
- obstructive thought
- obtaining
- obtaining items such as books
- obtaining land
- obtaining peace of mind through faith or ascetic practice
- obtaining the respective numbers of cranes and tortoises from the total of their heads and legs
- obtuse
- obtuse angle
- obtuse triangle
- obverse of an old "zeni" coin
- obverse side of a coin
- obversion
- obvious
- obviously
- obviously wrong
- ocarina
- occasion
- occasion when must be done
- occasional
- occasional income
- occasional or periodic extra long registration class or assembly in a school
- occasional thoughts
- occasional thoughts or impressions
- occasionalism
- occasionally
- occidental
- occidentalism
- occipital bone
- occipital lobe
- occiput
- occlusal surface
- occlusion
- occult
- occult boom
- occult culture
- occult divination system based on the Taoist theory of the five elements
- occult fad
- occultation
- occultism
- occupancy
- occupant
- occupation
- occupation largely dependent on public favor
- occupation period
- occupation zone
- occupational category
- occupational cohort
- occupational disease
- occupational group
- occupational injury
- occupational tax
- occupational therapist
- occupational therapy
- occupations dependent on public favor
- occupied
- occupied country
- occupied taxi
- occupied territory
- occupied zone
- occupy
- occupying
- occupying a certain place
- occupying a property and refusing to leave
- occupying forces
- occur to one
- occurrence
- occurrence of deep vein thrombosis in air travelers
- occurring
- occurring at a regular
- occurring at the time
- occurring in succession
- occurring simultaneously
- occurring together
- ocean
- ocean and atmosphere
- ocean basin
- ocean current
- ocean depths
- ocean development
- ocean fish
- ocean floor
- ocean investigation ship
- ocean liner
- ocean navigation
- ocean race
- ocean remote sensing
- ocean sector
- ocean space explorer
- ocean sunfish
- ocean surgeon
- ocean surveillance satellite
- ocean thermal energy conversion
- ocean trade
- ocean transportation
- ocean trench
- ocean water
- ocean-going ship
- oceanaut
- oceanfront
- oceanic
- oceanic climate
- oceanic plate
- oceanic whitetip shark
- oceanity
- oceanographer
- oceanographic observation
- oceanography
- oceanology
- oceans of love
- ocellate butterflyfish
- ocellate coralfish
- ocellated octopus
- ocelot
- ocher
- ochlocracy
- ochre
- octagon
- octagonal prism
- octagonal pyramid
- octahedrite
- octahedron
- octal
- octane
- octane value
- octant
- octathlon
- octave
- octave device
- octavo
- octavo format
- octennial
- octet
- octet-string type
- octillion
- octopods
- octopus
- octopus dried on skewers
- octopus dumplings
- octopus pot
- octopus regulator
- octopus-like
- octopuses and squid
- ocular lens
- ocular muscles
- ocular tension
- oculist
- oculomotor nerve
- odalisk
- odalisque
- odd
- odd and even numbers
- odd bit
- odd fellow
- odd function
- odd job
- odd jobs
- odd lot
- odd man out
- odd money
- odd number
- odd parity
- odd sum
- odd volume
- odd-toed ungulates
- oddball
- oddly
- oddly enough
- oddly shaped stone or rock
- odds
- odds and ends
- ode
- ode in reply
- oden
- oden vendor
- odious
- odious person
- odometer
- odor
- odor-resistant
- odorless
- odorless and colorless
- odour
- odour-resistant
- odourless
- oedema
- oedogonium
- oersted
- oestradiol
- oestriol
- oestrogen
- of Asian descent
- of a fearsome countenance
- of a former age
- of a larger size
- of absorbing interest
- of all people
- of all places
- of all things
- of bad omen
- of clashing swords
- of close texture
- of convention
- of course
- of different generations
- of dumbbells
- of each season
- of established reputation
- of fine character
- of finite type
- of foreign manufacture
- of good character
- of good omen
- of good quality
- of great build or stature
- of great interest
- of great prominence or dignity
- of great promise
- of great renown
- of humble birth
- of inquiring mind
- of interest
- of its own accord
- of large diameter
- of little hope
- of little importance
- of little significance
- of lofty character
- of loose morals
- of low character
- of low taste
- of military bearing
- of necessity
- of no account
- of no avail
- of no concern
- of no concern at all
- of no interest
- of no use
- of no use whatsoever
- of noble birth
- of one flesh
- of one's free will
- of one's life
- of one's own accord
- of one's own free will
- of one's own initiative
- of or about Japan
- of or relating to a plant that reproduces by apomixis
- of outstanding greatness
- of ownership of the inherited estate of a samurai who pledged allegiance to it
- of particular efficacy
- of peerless loyalty and bravery
- of poor character
- of poor quality or workmanship
- of quick intellect
- of rank
- of secondary import
- of some kind
- of some sort
- of sorts
- of strict morals
- of tender years
- of the imperial adviser
- of the kind
- of the land
- of the old feeling of naniwa-bushi
- of the order of
- of the previously mentioned
- of the same age
- of the same stripe
- of the same type
- of the sort
- of the ukiyoe style
- of these
- of thin make
- of two
- of two parties engaged in an activity
- of uncertain meaning
- of uneasy conscience
- of uneven heights or lengths
- of uneven quality
- of unknown affiliation
- of unknown authenticity
- of unsound mind
- off
- off Broadway
- off by a digit
- off duty
- off grounds
- off hook
- off mike
- off shoulder
- off the books
- off the cuff
- off the map
- off the point
- off the premises
- off the record
- off the road tire
- off the shelf
- off the top of one's head
- off timer
- off topic
- off your own bat
- off-beat
- off-campus
- off-centre
- off-crops season
- off-flavor
- off-flavour
- off-floor trading
- off-hand
- off-key
- off-limits
- off-line
- off-line meeting
- off-off-Broadway
- off-peak telephone call price reduction
- off-period
- off-point
- off-putting
- off-ramp
- off-road
- off-road bike
- off-road race
- off-road vehicle
- off-screen memory
- off-season
- off-season flowering
- off-shoot
- off-shore delivery
- off-side
- off-site centre
- off-site meeting
- off-street
- off-the-cuff
- off-the-job training
- off-the-rack clothing
- off-the-record
- off-the-shelf
- off-the-shoulder neckline
- off-time
- off-topic
- off-track
- off-track betting
- off-white
- offal
- offbeat
- offence
- offence and defence
- offender
- offense
- offense against police regulations
- offense against public morals
- offense against the Buddhist commandments
- offense and defense
- offensive
- offensive ability
- offensive and defensive alliance
- offensive camp
- offensive joke
- offensive smell
- offensive weapons
- offensiveness
- offer
- offer for use
- offer of job
- offered load
- offering
- offering a course
- offering a cup in return
- offering a drink
- offering a full report to a superior
- offering a gift
- offering a wand with hemp and paper streamers to a Shinto god
- offering ceremony held on the third day of the dog after the winter solstice
- offering for sale
- offering memorandum
- offering of consecrated rice
- offering of flowers
- offering of mochi rice cakes
- offering of the year's new rice harvest
- offering one's opinion
- offering one's opinion to one's superior
- offering one's resignation
- offering prizes
- offering promising prospects
- offering something free as a promotion
- offering to a deity or somebody's spirit
- offering to suffering spirits at the river
- offering water before a grave
- offerings
- offerings and worship
- offerings made to Buddha or placed on a mortuary tablet
- offerings made to monks
- offerings of food
- offerings of rope
- offertory
- offertory box
- offertory music
- offhand
- offical history
- office
- office amenity
- office and rank
- office application
- office automation
- office boy
- office building
- office chief
- office code
- office complex
- office computer
- office data
- office employee
- office establishment
- office for rent
- office for storing land taxes
- office girl
- office hours
- office in Heian Kyoto responsible for police and judicial duties
- office in charge of the Emperor's meals
- office jargon
- office kitchenette
- office lady
- office landscape
- office of a temple
- office or indoor work
- office organisation
- office organization
- office park
- office partition
- office personnel
- office romance
- office setup
- office software package
- office space for rent
- office suite
- office supplies
- office to let
- office wife
- office work
- office worker
- office-seeking
- officer
- officer below the rank of major
- officer cadet
- officer of the court
- officer's compensation or remuneration
- officer's orderly
- officers and men
- officers and soldiers
- officers' bonuses
- offices of a public or governmental organization
- official
- official Confucian teacher
- official and personal
- official announcement
- official appointed by the Emperor
- official attendance service
- official body
- official bulletin
- official bulletin board
- official business
- official candidate
- official certification
- official copy of part of family register
- official copy of the family register
- official daily gazette
- official decision
- official demand
- official discount rate
- official divorce registration papers
- official document
- official during the ritsuryo period who was allowed to use the state-provided stables and horses
- official duties
- official ethics
- official function
- official game
- official gazette for elections
- official government permission
- official handicap
- official history
- official holding a lifetime appointment
- official in charge
- official in charge of court poetry and music
- official in charge of imprisoning offenders
- official in charge of the administration of domains and general affairs of powerful noble families
- official interpretation or construction
- official interpreter
- official kana romanization system
- official language
- official languages of the UN
- official letter
- official licence
- official license
- official market quotations
- official member
- official morality
- official name
- official name of a country
- official notice
- official or otherwise
- official orders
- official papers
- official pay
- official position
- official position or title
- official postcard
- official price
- official proclamation
- official publication
- official publications
- official quarters
- official quotation
- official rank
- official reception hall
- official recognition
- official record
- official regulations
- official residence
- official responsible for court ceremonies
- official salary
- official seal
- official seal of a company
- official stance
- official state marine fish of California
- official style
- official suggestion
- official sumo tournament
- official supplier
- official support
- official telegram
- official terminology
- official title
- official tour
- official use
- official vehicle
- official visit
- official visit to a shrine
- official warning
- official who arranges festival and rites
- official whose appointment and dismissal requires Imperial acknowledgement
- official winning technique
- officialdom
- officialism
- officially allowed
- officially registered seal
- officially sanctioned brothel
- officials
- officials in charge
- officials who helped the council of elders during the Edo period
- officiant
- officiating
- officiating monk
- officious
- officiousness
- offing
- offing wave
- offline
- offline folder file
- offline help
- offline meeting
- offline storage
- offprint
- offset
- offset cylinder
- offset printing
- offsetting each other
- offshoot
- offshore
- offshore center
- offshore centre
- offshore company
- offshore development
- offshore fishing
- offshore fishing industry
- offshore fund
- offshore market
- offshore oil field
- offshore structure
- offshore trawl fishery
- offside trap
- offspring
- offstage
- oft-repeated descriptive epithets in poetry
- often
- often 31 morae
- often at ryokan
- often has Internet facilities
- often hypoxic gas mix used by divers
- often in a park
- often in the form of a folding case with clasps
- often kindergarten to university
- often made from gilt copper
- often mainly in kana and written by women
- often of Zen content
- often owned by former sumo wrestler
- often seasoned with soy sauce
- often trivial
- often used in relation to qualifications and requirements for a position
- often with an ornament at the end
- often with green
- ogle
- ogo
- ogre
- ogre-like person
- ogress
- oh
- oh boy
- oh dear!
- oh my!
- oh no
- oh no!
- oh yes!
- oh!
- oh?
- ohmmeter
- oi
- oi!
- oicho-kabu
- oil
- oil ball
- oil barrel
- oil beetle
- oil boom
- oil brake
- oil burner
- oil cake
- oil cask
- oil color
- oil colors
- oil colour
- oil colours
- oil company
- oil concession
- oil container
- oil content
- oil cooler
- oil crisis
- oil damper
- oil dealer
- oil depletion
- oil dollar
- oil engine
- oil exploration
- oil expression
- oil facility
- oil fence
- oil field
- oil finish
- oil impregnation
- oil lamp
- oil leak
- oil magnate
- oil massage
- oil merchant
- oil money
- oil pack
- oil paint
- oil painting
- oil painting look
- oil paints
- oil palm
- oil paper
- oil peddler
- oil pipeline
- oil platform
- oil pressure
- oil pressure gauge
- oil production
- oil pump
- oil refinery
- oil refining
- oil reserve
- oil resources
- oil rig
- oil road
- oil sands
- oil shale
- oil shampoo
- oil shock
- oil spill
- oil stain
- oil strata
- oil supply
- oil tank
- oil tight
- oil well
- oil-absorbent paper used cosmetically to absorb oil from skin
- oil-based
- oil-based clay
- oil-based medicine
- oil-based paint
- oil-based paints
- oil-bearing
- oil-containing
- oil-heater
- oil-producing countries
- oil-retaining bearing
- oilcan
- oilcloth
- oilcoat
- oiled leather
- oiled paper
- oiled sardine
- oiled silk
- oiled umbrella paper
- oilfish
- oilgas
- oiliness
- oiling
- oiling a machine
- oiling brush
- oils
- oilskin
- oilstone
- oiltanker
- oily
- oily bitterling
- oinking
- ointment
- oiran
- okapi
- okay
- okesa song
- okonomiyaki shop
- okra
- old
- old English
- old JIS kanji character code
- old Japanese court music
- old Japanese court music from the Nara period
- old Japanese system of weights and measures
- old Kyoto
- old account
- old acquaintance
- old age
- old age and death
- old age and sickness
- old age pension
- old agreement
- old alcohol
- old and new
- old and strange
- old and young
- old article
- old badger
- old bag
- old bat
- old battlefield
- old bird
- old body
- old book
- old bowl
- old boy
- old building
- old castle
- old ceremonial costume
- old ceremonial court dress
- old chap
- old character form
- old character pronunciation
- old characters
- old chronicle
- old clock
- old cloth
- old clothes
- old coin
- old country
- old couple
- old covenant
- old crimes
- old cryptomeria
- old current
- old custom
- old customs
- old days
- old debt
- old dog
- old edition
- old enemy
- old enough
- old etiquette
- old evils
- old family
- old family register
- old fan
- old fashioned
- old fashioned-style ice cream
- old father
- old favors
- old favours
- old female servant
- old fief
- old fogey
- old folks' home
- old fortress
- old fox
- old friend
- old friendship
- old furniture
- old gentleman
- old girl
- old girlfriend
- old goat
- old grudge
- old guard
- old hand
- old haunts
- old home
- old house
- old housekeeper
- old housemaid
- old imperial palace
- old imported article
- old information
- old ink stick
- old interpretation
- old joy
- old kiln sites
- old lady
- old law
- old liberalist
- old love
- old magazines
- old maid
- old man
- old man living in the countryside
- old man who takes Viagra
- old man's beard
- old man's mask
- old manner of reckoning one's age
- old manners
- old manuscript
- old meaning
- old men
- old metal
- old method
- old monetary unit
- old mother
- old music
- old name
- old name for Niigata Prefecture
- old name for a cave cricket
- old name for part of Hyogo prefecture
- old name for the bunraku
- old name of Tokyo
- old nest
- old news
- old newspapers
- old offender
- old or key retainer
- old or veteran army general
- old order
- old people
- old people's home
- old person
- old person thrown away in the mountains
- old pine
- old pine tree
- old playmate
- old poem
- old pond
- old pool
- old pottery
- old power
- old precedent
- old priest
- old promise
- old proverb
- old rag
- old rags
- old reading
- old record
- old recording
- old regime
- old regulations
- old relationship
- old remaining customs
- old retainer
- old rice
- old river
- old road
- old rose
- old sake
- old school
- old school tie
- old score
- old shoes
- old shop
- old shrine
- old shrines and temples
- old sinner
- old small shrine
- old soldier
- old song
- old stand-by
- old state of affairs
- old stock
- old stone age
- old story
- old style
- old style fermented crucian carp sushi
- old suit
- old sword
- old sword fighting
- old system
- old tale
- old temple
- old term for Buddhist priesthood and the common people
- old term for rakugo
- old theory
- old things
- old timer
- old times
- old town
- old tradition
- old translation
- old tree
- old trees of historical interest
- old turtle with seaweed growing on its back
- old type
- old unpleasant incident
- old unused well
- old version
- old village
- old witch
- old woman
- old woman angelfish
- old woman ghost from the Kanto region
- old woman with white hair
- old word for licensed elementary school teacher
- old works of art
- old world forked fern
- old wound
- old writing
- old-age pension
- old-fashioned
- old-fashioned boys' hairstyle
- old-fashioned idea
- old-fashioned interior light fixture comprising a wooden pole with an oil-filled dish and a wick atop it
- old-fashioned person
- old-fashioned spirit
- old-fashioned way of thinking
- old-fashioned ways
- old-man's wisdom
- old-structure form
- old-style fermented sushi
- old-style kanji
- old-timer
- olden
- olden days
- olden-day
- older
- older and fashionable man
- older and more neutral name for bunraku
- older brother
- older brother and younger sister
- older building
- older graduate
- older lady
- older male in an homosexual relationship
- older person conducting a funeral service for a younger relative
- older person who enjoys free and easy lifestyle unfettered by social taboos
- older sister
- older sister and younger brother
- older unmarried woman
- oldest
- oldest architectural style for Shinto shrines
- oldest child
- oldest mankind
- oldest person
- oldfashioned glass
- oldham blueberry
- oldie
- oldies
- oldness
- oldtimer
- oleander
- oleandomycin
- oleaster
- olecranoid bursitis
- olecranon bursitis
- olefin
- olefine
- oleic acid
- oleophilic
- oleoresin
- olfactory cell
- olfactory nerve
- olibanum
- oligarchy
- oligoamnios
- oligochaetes
- oligohydramnios
- oligomer
- oligonucleotide
- oligopoly
- oligopsony
- oligosaccharide
- oligotrophic lake
- oliguria
- olistostrome
- olivaceous piculet
- olive
- olive brown
- olive chromis
- olive drab
- olive flounder
- olive green
- olive oil
- olive-backed pipit
- olivine
- olm
- olympic congress
- ombudsman
- ombudsperson
- omega
- omega navigation
- omega-3 fatty acid
- omelet
- omelet with a filling of ketchup-seasoned fried rice
- omelette
- omen
- omen of disaster
- omicron
- omigosh
- ominous
- ominous bird
- ominous cloud
- ominous word
- omission
- omission in a bill
- omission of courtesy
- omitted tag minimization parameter
- omitted word
- omitted word or character
- omitting
- omitting crucial steps
- omitting some passages
- omitting the beginning
- omitting the rest
- omni-
- omnibus
- omnibus term for the names of cities
- omnidirectional foreign policy
- omnipotent
- omnipresence
- omnipresent
- omniscience
- omniscience and omnipotence
- omnivore
- omnivorous
- omnivorous animal
- omoiyari yosan
- on
- on a charge of murder
- on a floor
- on a grand scale
- on a shift
- on a stage or platform or altar
- on a technical level
- on a whim
- on account of
- on air
- on alert
- on all fours
- on an emotional level
- on an equal footing
- on an extensive scale
- on and after
- on and on
- on bad terms
- on base
- on behalf of
- on board
- on board a ship
- on break
- on business
- on cordial terms with
- on countless occasions
- on demand
- on demand dial-up
- on doctor's orders
- on duty
- on edge
- on everybody's lips
- on good terms
- on good terms with
- on hand
- on hand or at home
- on hook
- on horseback
- on inquiry
- on issue
- on leaving a place one should see that all is in good order
- on memory
- on my part
- on no account
- on occasions
- on one hand
- on one occasion
- on one's back
- on one's guard
- on one's hands and feet
- on one's high horse
- on one's own accord
- on one's own account
- on one's own authority
- on one's own initiative
- on one's own responsibility
- on one's way
- on opportunity
- on or aboard a train or vehicle
- on or at a per capita basis
- on paper
- on par
- on parting
- on purpose
- on reading of kanji
- on reflection
- on sale soon
- on sand
- on schedule
- on second thought
- on stage
- on such good terms as to know what each other is thinking
- on tenterhooks
- on that note
- on that occasion
- on that subject ...
- on the ... side
- on the air
- on the air lamp
- on the attack
- on the bank of
- on the basis of
- on the brink
- on the brink of
- on the brink of collapse
- on the brink of death
- on the chopping board
- on the contrary
- on the desk
- on the dot
- on the dry side
- on the earth
- on the first opportunity
- on the funding side
- on the go
- on the grounds
- on the grounds that
- on the high seas
- on the high side
- on the island
- on the lake
- on the large size
- on the least pretext
- on the left as one faces
- on the line
- on the long side
- on the march
- on the mark
- on the occasion
- on the occasion of
- on the offensive
- on the one hand
- on the other hand
- on the plea of
- on the point of
- on the point of vanishing
- on the previous year
- on the rebound
- on the right as one faces
- on the road
- on the rocks
- on the roof
- on the same night
- on the same occasion
- on the sea or ocean
- on the shelf
- on the shores of
- on the sly
- on the small side
- on the snow
- on the spot
- on the spur of the moment
- on the street
- on the strength of numbers
- on the surface
- on the surface of the ice
- on the table
- on the topic of
- on the verge
- on the verge of
- on the verge of death
- on the verge of dying
- on the verge of sleep
- on the verge of starvation
- on the verge of waking
- on the wane
- on the water
- on the waves
- on the way
- on the way back
- on the way here
- on the way home
- on the way home from work
- on the weak side
- on the whole
- on this occasion
- on time
- on timer
- on top of
- on top of a saddle
- on top of a tall building
- on top of all that
- on top of that
- on top of the world
- on very good terms with each other
- on what business
- on which Buddhist rituals are performed
- on which Edo-period authorities forced suspected Christians to trample
- on which an oak tree is painted
- on your mark
- on'e own area of the field
- on'yomi
- on-air monitor
- on-base percentage
- on-board
- on-board computer
- on-board device
- on-board ship
- on-chip cache
- on-deck batter's circle
- on-demand paging
- on-demand water heater
- on-limits
- on-line
- on-line data processing
- on-line database
- on-line dictionary
- on-line edition
- on-line job-hunting
- on-line network system
- on-line real time system
- on-line sign up
- on-line submission of an application form
- on-line system
- on-line trading
- on-line version
- on-line volume management
- on-mike
- on-off
- on-off timer
- on-ramp
- on-screen
- on-screen display
- on-screen electronic book
- on-screen function
- on-screen tutorial
- on-screen window
- on-side
- on-site
- on-site inspection
- on-site investigation
- on-site service
- on-site support
- on-stage composure
- on-street parking
- on-the- fly recording
- on-the-fly printer
- on-the-job accident
- on-the-job training
- on-the-move interview
- on-the-scene coverage
- on-the-sea ballot
- on-the-site inspection
- on-the-spot
- on-the-spot broadcast
- on-the-spot decision-making
- on-the-spot filming or photography
- on-the-spot inspection
- on-the-spot interview by surrounding reporters
- on-the-spot investigation
- on-the-spot investigation or inspection
- on-the-spot or live broadcast
- on-the-spot report
- on-the-spot telecast
- on-trade
- onager
- onanism
- onboard device
- once
- once a fool
- once a year
- once again
- once and for all
- once around
- once bitten twice shy
- once in a lifetime
- once in a while
- once more
- once or twice
- once per week
- once through
- once upon a time
- once you're dead
- once-in-a-lifetime encounter
- oncilla
- oncogene
- oncology
- oncoming age
- oncoming car
- oncoming lane
- oncovirus
- ondes Martenot
- one
- one ...
- one Buddhist image
- one Nth part
- one act
- one action
- one advantage
- one after another
- one after next
- one after the other
- one aircraft
- one amount
- one and all
- one and only
- one animal
- one area
- one area or skill
- one arm
- one article
- one aspect
- one at a time
- one bag
- one bagful
- one banner
- one beat
- one better
- one billion
- one billionth
- one block
- one block of tofu
- one boat
- one body