;
- PbO2
- Peace Preservation Act
- Pearl Harbor
- Peasants' Revolt
- Peasants' War
- Pediculus humanus
- Peeping Tom
- Pegasus
- Pekinese
- Peking
- Peking duck
- Peking man
- Pekingology
- Pele's hair
- Pele's tears
- Pellucida pygmy goby
- Peloponnesian War
- Pemba chromis
- Penglai Island
- Penicillium
- Pennsylvania
- Pennsylvania Dutch
- Pennsylvania German
- Penrose
- Penstemon frutescens
- Pentagon
- Pentateuch
- Pentax
- Pentecost
- Pentecostal movement
- Penthorum chinensis
- Pentium
- Pentium II
- Pentium II Xeon
- Pentium III
- Pentium ODP
- Pentium Pro
- Peony
- People may be offended by the way you speak
- People of God
- People will talk
- People's Army
- People's Commissar
- People's Liberation Army
- People's New Party
- People's Republic of China
- PeopleSoft
- Pepsi
- Percheron
- Perciformes
- Percoidei
- Perfect timing!
- Perfection of Wisdom
- Perilla frutescens
- Perilla frutescens var. frutescens
- Peripatetic school
- Perissodactyla
- Perl
- Perl-Tk
- Permanent Virtual Circuit
- Permian period
- Perseids
- Perseus
- Persia
- Persian
- Persian Gulf crisis
- Persian Wars
- Persian carpet
- Persian cat
- Persian lion
- Persian person
- Persian speedwell
- Personal Area Network
- Personal Information Protection Law
- Personal Status Actions Procedure Law
- Personifer angelfish
- Peru
- Peruvian chromis
- Peter Pan
- Peter Pan collar
- Peter Pan syndrome
- Petri
- Petri dish
- Petri-net
- Petromyzon
- Petromyzontidae
- Peucedanum japonicum
- Peyronie's disease
- PhD
- Phalaenopsis
- Phanerozoic
- Pharisee
- Pharisees
- Pharmaceutical Affairs Law
- Pharmaceutical and Food Safety Bureau
- Phase Modulation
- Phasianidae
- Pheropsophus jessoensis
- Philadelphia
- Philadelphia fleabane
- Philadelphus satsumi
- Philip
- Philippine Sea Plate
- Philippine butterflyfish
- Philippines
- Philippines chevron butterflyfish
- Philippines chromis
- Philips
- Philistine
- Philistine people
- Phillips curve
- Phillips head screwdriver
- Philopon
- Philosophiae Naturalis Principia Mathematica
- Phocidae
- Phoenicia
- Phoenician alphabet
- Phoenician character
- Phoenix
- Pholidota
- Phong shading
- PhotoCD
- Phylum Magnoliophyta
- Physical Address Extension
- Physical Delivery
- Physical Delivery Access Unit
- Physical Delivery System
- Pi
- Piaget
- Picasso
- Pictor
- Pieris japonica
- Pieris melete
- Pieta
- Pietism
- Pilgrim Fathers
- Pilgrim's Progress
- Pilsener
- Pilsner
- Piltdown hoax
- Piltdown man
- PinYin
- Pinaceae
- Pinales
- Pindola
- Pindola Bharadvaja
- Pinna bicolor
- Pinot Noir
- Pioneer
- Pippin ATMARK
- Pisa
- Pisces
- Pitcairn
- Pithecanthropus erectus
- Pituitrin
- Pixar
- Placamen tiara
- Planck's constant
- Planck's law
- Planck's quantum hypothesis
- Plantae
- Plantaginaceae
- Platax
- Plato's problem
- Platonic love
- Platonism
- Platycodon grandiflorum
- Playing the dandy ruins a man
- Playstation
- Plaza agreement
- Please excuse my thoughtless words.
- Plectranthus inflexus
- Pleiades
- Pleiades cluster
- Pleiades star cluster
- Pleioblastus chino
- Pleistocene epoch
- Plesiosaurus
- Pleuronectes
- Plimsoll line
- Plimsoll mark
- Pliocene epoch
- Plough
- Plum Blossom Festival
- Pluto
- PnP
- Poaceae
- Podocarpus macrophyllus var. maki
- Point Of Sales
- Point-Of-Sale
- Poisson distribution
- Poland
- Polaris
- Polaroid
- Polaroid camera
- Polaroid picture
- Police hi-tech crime centre
- Polisario Front
- Polish
- Polish notation
- Politburo
- Political Funds Control Law
- Pollia japonica
- Polluter Pays Principle
- Polyergus samurai
- Polygonaceae
- Polygonatum falcatum
- Polygonum cuspidatum
- Polygonum filiforme
- Polygonum tenuicaule
- Polylepion russelli
- Polynesia
- Polynesians
- Pomacanthus
- Pomacentridae
- Pomacentrus
- Pomeranian
- Ponerorchis graminifolia
- Ponzi scheme
- Pope
- Popess
- Popillia japonica
- Populus euphratica
- Poria cocos
- Porphyra tenera
- Porphyra yezoensis
- Porsche
- Port Jackson shark
- Port and Harbor Authority
- Portege
- Portland cement
- Portugal
- Portuguese
- Portuguese Jesuits
- Portuguese card game popular in Japan during the late 16th century
- Portuguese man-of-war
- Portulaca
- Poseidon
- Post Office box address
- Post-It
- Post-impressionism
- Postal Bureau
- Postal Savings Bureau
- Postal Savings system
- Postal Services Agency
- Postgres
- Postpet
- Potsdam Conference
- Potsdam Declaration
- Potsdam Orders
- Potter's angelfish
- Poverty dulls the wit
- Poverty is a stranger to industry
- Power++
- PowerBuilder
- PowerDesigner
- PowerJ
- PowerOPEN
- PowerPC
- PowerSite
- PowerSoft
- Powerbook
- Prabhutaratna
- Prague
- Prajnaparamita
- Prajnaparamita Sutra
- Pravda
- Prayer to the Four Quarters
- Pre-Raphaelite Brotherhood
- Precambrian era
- Premier
- Presbyterian Church
- Presbyterians
- President of the United States of America
- Presta valve
- Pretoria
- Prevention is better than cure
- Preventive Vaccination Law
- Pride comes before a fall
- Pride will have a fall
- Primates
- Prime Minister
- Prime Minister also serving as Foreign Minister
- Prime Minister or Premier
- Prime Minister's office
- Prime Minister's official residence
- Princess Sen
- Print Gokko
- Print Manager
- Prionace
- Prionurus
- Prius
- Private Branch eXchange
- Private Directory Management Domain
- Private Management Domain
- Private company
- Privilege-Attribute-Certificate
- Privy Council
- Prize for Creativity
- Prize to Schools for Nurturing Creativity
- Pro*C
- ProActive
- Prodigy
- Product Liability
- Prognathodes
- Programmed Input-Output
- Programming in Logic
- Progressive Conservative Party of Canada
- Prohibition Law
- Prometheus
- Promide
- Promised Land
- Proscylliidae
- Proscyllium
- Proscyllium venustum
- Prospect is often better than possession
- Protection of Personal Liberty Law
- Protector General
- Protectorate General
- Protectorate General of Annam
- Protectorate General of Beiting
- Protectorate General of the Central Asian Nomadic Lands
- Protectorate General of the Western Regions
- Protectorate General to Pacify the East
- Protectorate General to Pacify the North
- Protectorate General to Pacify the West
- Proterozoic era
- Protestant Church
- Protestant Episcopal Church
- Protestantism
- Proto-Indo-European
- Protocol Data Unit
- Protocol Machine
- Protura
- Proverbs
- Providence
- Providing is preventing
- Prunus cerasifera var. atropurpurea
- Prunus donarium
- Prunus itosakura
- Prunus japonica
- Prunus mume var. bungo
- Prunus persica var. densa
- Prunus pseudo-cerasus
- Prunus salicina
- Prunus yedoensis
- Prussia
- Prussian
- Prussian blue
- Przewalski's horse
- Psalms
- Pseudobagrus ichikawai
- Pseudocarcharias
- Pseudocarchariidae
- Pseudomonas aeruginosa
- Pseudorinelepis genibarbis
- Pseudotriakidae
- Pseudotriakis
- Psyche
- Pteranodon
- Pteria brevialata
- Pteromys volans orii
- Ptolemaic Dynasty
- Ptolemaic constellations
- Ptolemaic theory
- Ptolemy
- Public Corporation and National Enterprise Labor Relations Commission
- Public Corporations and Government Enterprises Labor Relations Act
- Public Key Infrastructure
- Public Nursing Care Insurance Law
- Public Office Election Law
- Public Prosecutor's Office
- Public Security Examination Commission
- Public Security Intelligence Agency
- Pubzine
- Puccini
- Pueblo
- Pueblo Indian
- Puer tea
- Puerto Rico
- Pugwash conferences
- Pulitzer
- Pulitzer prize
- Pullman car
- Pungtungia herzi
- Punic Wars
- Punica granatum
- Punjabi
- Pure Land
- Pure Land Buddhism
- Pure Land sect
- Pure Land teachings
- Puritan
- Puritan Revolution
- Purkinje cell
- Purkinje effect
- Purkinje fiber
- Purkinje fibre
- Purple Forbidden Enclosure
- Putin
- Pyongyang
- Pyramidon
- Pyrex
- Pyrex glass
- Pyroceram
- Pyrrosia tricuspis
- Pythagorean temperament
- Pythagorean theorem
- Pythagorean tuning
- Pyxis
- Pタイル [ピータイル]
- Pバルブ [ピーバルブ]
- P波;ピー波 [ピーは]
- Q
- Q fever
- Q-Vision
- Q;q [キュー]
- QA
- QAM
- QED
- QLD
- QOL
- QOL [キューオーエル]
- QOS
- QR code
- QRコード [キューアールコード;キューアーコード]
- QSO
- QT延長症候群 [キューティーえんちょうしょうこうぐん]
- QUICK B
- QUICK-VAN
- QUICKEN
- Qi
- Qiang
- Qin
- Qing
- Qing Dynasty
- Qing government
- Qing-dynasty system assigning equal numbers of Manchurians and Han Chinese to central government agencies
- Qing-era Chinese music
- Qingtan
- Quadrature Amplitude Modulation
- Quaker
- Quakers
- Quantum
- Quanzhen
- Quaternary period
- Quebec
- Quecha
- Quechua
- Queen Anne's lace
- Queen Mother
- Queen Mother of the West
- Queen's English
- Queensland
- Queensland grouper
- Queensland pygmy goby
- Queensland yellowtail angelfish
- Quercus dentata
- Quercus gilva
- Quercus sessilifolia
- Quichua
- QuickDraw
- QuickTime
- Quonset hut
- Qur'an
- Quran
- Q熱 [キューねつ]
- R
- R & B
- R and D
- R&D
- R&D [アールアンドディー]
- R-18
- R;r [アール]
- RAD
- RAM
- RAM [ラム]
- RAMDAC
- RAPCON
- RAS
- RAS [ラス]
- RBI
- RBI hit
- RBOC
- RC造 [アールシーぞう]
- RDA
- RDB
- RDBMS
- RDO
- RDS
- README
- REM
- REM [レム]
- REM sleep
- RENGO
- RESale
- RETURN key
- REXX
- RF
- RF [アールエフ]
- RFC
- RFID
- RFID tag
- RFID;RF−ID [アールエフアイディー]
- RFP
- RFタグ [アールエフタグ]
- RGB
- RGNP
- RHR
- RIMNET
- RIP
- RISC
- RISC [リスク]
- RJ
- RJE
- RLS
- RMI
- RMS
- RN
- RNA
- RNA [アールエヌエー]
- RNA virus
- RNAウイルス [アールエヌエーウイルス]
- RO
- ROA
- ROE
- ROLAP
- ROM
- ROM [ロム]
- ROTC
- ROTFL
- RP
- RPG
- RPN
- RPS
- RS
- RS virus
- RS-232C
- RS-232D
- RS-422
- RS232ケーブル [アールエスにさんにケーブル]
- RSI
- RSPT
- RSウイルス [アールエスウイルス]
- RTF
- RTFJ
- RTS
- RU 486
- RU-486
- RU486 [アールユーよんはちろく]
- RV
- RV [アールブイ]
- RV車;アールブイ車 [アールブイしゃ]
- RWCS
- RZ
- Rachmaninoff
- Ragaraja
- Rahmen
- Rainford's butterflyfish
- Rajput
- Ralph Lauren
- Ramadan
- Raman effect
- Ramanas rose
- Rambus
- Ramsar Convention
- Randall's chromis
- Randall's pygmy goby
- Rangoon creeper
- Ranunculaceae
- Ranunculales
- Rape of Nanking
- Rapture
- Rashidun period
- Rasta
- Rastafari movement
- Rastafarian
- Rastafarianism
- Ratnasambhava
- Ray-Ban
- Rayleigh scattering
- Rayleigh wave
- Raynaud's disease
- Reading something again and again
- Reaganomics
- Real Presence
- RealAudio
- Really!
- Really?
- Records of Ancient Matters
- Recovery Management Support
- Red
- Red Army
- Red Book
- Red Brigades
- Red Crescent Society
- Red Cross
- Red Cross Convention
- Red Crystal
- Red Data Book
- Red Flag
- Red Guards
- Red Queen hypothesis
- Red Sea
- Red Sea angelfish
- Red Sea bannerfish
- Red Sea chevron butterflyfish
- Red Sea goatfish
- Red Sea raccoon butterflyfish
- Red Sea sailfin tang
- Red Sea surgeonfish
- Red Turban Rebellion
- Red sky at night
- RedBrick
- RedHat Linux
- Redfin butterflyfish
- Reduced Instruction Set Computer
- Reebok
- Reeves spirea
- Reeves' turtle
- Reference Only
- Reform Party
- Reform Shinto
- Reformation
- Reformed Churches
- Regional Bell Operating Company
- Regional Code
- Regulus
- Reiki
- Reiki era
- Reiyukai
- Rekiou era
- Relational Database system
- Remington
- Remote Access Services
- Remote Job Entry
- Remote Operation Service Element
- Renaissance
- Renault
- Repeated reading
- Reproduction Prohibited
- Republic of Angola
- Republic of China
- Republic of Ghana
- Republic of Greece
- Republic of Guatemala
- Republic of Guinea
- Republic of Guinea-Bissau
- Republic of Haiti
- Republic of Honduras
- Republic of Kenya
- Republic of Korea
- Republic of Mozambique
- Republic of South Africa
- Republic of Zambia
- Republic of Zimbabwe
- Republic of the Congo
- Republic of the Gambia
- Republican Party
- Republique francaise
- Request-To-Send
- Requiem Mass
- Reserve Officers' Training Corps
- Resources Super Profits Tax
- Respect-for-the-Aged Day Holiday
- Respectfully yours
- Restless Leg Syndrome
- Restoration Shinto
- Return-to-Zero
- Reunion
- Reuters
- Revelation
- Revised Version
- Reye's syndrome
- Reynoutria japonica
- Rh
- Rh blood type
- Rh factor
- Rhaeto-Romance
- Rhamnaceae
- Rhamnales
- Rhapis humilis
- Rhee Syngman
- Rhesus factor
- Rhincodon
- Rhincodontidae
- Rhine
- Rhine maiden who lured sailors to their doom
- Rhinochimaera
- Rhinochimaera africana
- Rhinochimaeridae
- Rhizophora mucronata
- Rhizopogon rubescens
- Rhizoprionodon
- Rhizopus
- Rhode Island
- Rhodea japonica
- Rhodeus atremius atremius
- Rhododendron macrosepalum
- Rhododendron metternichii
- Rhododendron metternichii var.
- Rhododendron oomurasaki
- Rhododendron spp.
- Rh因子 [アールエッチいんし]
- Rh式血液型 [アールエッチしきけつえきがた]
- Rias
- Ribes
- Rice Price Deliberative Council
- Rich is the person who is content with what he is
- Richard's dragonet
- Richardson Affair
- Richardson's dragonet
- Riches and honors are as fleeting as floating clouds
- Richter Scale
- Ricinus communis
- Ricoh
- Riemannian geometry
- Riesling
- Rig Veda
- Rigel
- Rigel Kentaurus
- Right
- Rigveda
- Rijndael
- Rikkokushi
- Rikkyo-Meiji game
- Ring of Fire
- Ringer's solution
- Rinzai school of Buddhism
- Ripple
- Rissho Kosei-kai
- Risso's dolphin
- Ritalin
- Ritsu
- Road Traffic Act
- Road Traffic Law
- Roche limit
- Roche's limit
- Rochelle salt
- Rochester
- Rocky Mountain goat
- Rocky Mountains
- Rodentia
- Roentgenium
- Roger's bronze leaf
- Rolex
- Rollback-initiating service primitive
- Rolls-Royce
- Rom
- Roma
- Romaji input
- Roman Catholic Church
- Roman Curia
- Roman Empire
- Roman god or goddess
- Roman law
- Roman mythology
- Roman myths
- Roman numerals
- Roman type
- Roman-nose spinefoot
- Romance languages
- Romancing SaGa
- Romanesque architecture
- Romani person
- Romanian
- Romano cheese
- Romansch
- Romantic music
- Romany
- Rome
- Rome was not built in a day
- Rookie of the Year award
- Roquefort
- Rorschach inkblot test
- Rorschach test
- Rosa laevigata
- Rosaceae
- Rosales
- Rosenberg's monitor
- Roseola infantum
- Rosetta Stone
- Rosetta stone
- Rosicrucian
- Rosser
- Rossignol
- Rossini
- Rotary Club
- Rotational Position Sensing
- Rotring
- Roumanian
- Round Table Conference on Rice Price
- Rouzhi
- Royal Host
- Royal Marines
- Royal Navy
- Royalists
- Rube Goldberg machine
- Rubik's Cube
- Rubus buergeri
- Rubus hirsutus
- Rubus palmatus var. coptophyllus
- Rubus trifidus
- Ruby
- Rule
- Rumanian
- Ruputer
- Rus'
- Russell's viper
- Russell-Einstein Manifesto
- Russia
- Russia and France
- Russia and Japan
- Russian
- Russian 3-stringed instrument with a triangular body
- Russian Communist Party
- Russian Orthodox Church
- Russian Revolution
- Russian army
- Russian blouse
- Russian character
- Russian characters
- Russian nesting doll
- Russian person
- Russian rock birch
- Russian roulette
- Russian-Japanese
- Russo-German War
- Russo-Japanese War
- Russo-Japanese treaty in which Japan exchanged Sakhalin for the Kuril Islands
- Russo-Turkish War
- Ruth
- Rwanda
- Ryakunin era
- Ryakuou era
- Rydberg constant
- Ryougoku
- Ryukyu long-haired rat
- Ryukyu odd-tooth snake
- Ryukyu rabbit
- Ryukyu robin
- Ryukyu sika
- Ryukyu spiny rat
- Ryukyu tree lizard
- Ryukyuan languages
- Ryuukyuu Islands
- S [エス]
- S size
- S-shape
- S-wave
- S.
- S3
- SA
- SAA
- SAD
- SALT
- SAM
- SAP
- SAP R-3
- SAR
- SARS
- SARS [サーズ]
- SAS
- SASE
- SAT
- SB
- SB [エスビー]
- SBR
- SC
- SCANDISK
- SCARA
- SCD
- SCID
- SCID [スキッド]
- SCID mouse
- SCIDマウス [スキッドマウス]
- SCM
- SCO
- SCOP
- SCR
- SCSI
- SCSI-2
- SCSI-3
- SCTR
- SCUBA
- SD
- SD-RAM
- SDF Law
- SDH
- SDK
- SDLC
- SDR
- SDRAM
- SDSL
- SDSL [エスディーエスエル]
- SDU
- SD法 [エスディーほう]
- SE
- SEAL
- SEC
- SETUP message
- SEWB
- SF
- SF [エスエフ]
- SFA
- SFX
- SGI
- SGML
- SI
- SIA
- SIDS
- SIG
- SII
- SIM card
- SIM lock cancellation
- SIM unlock
- SIMCITY
- SIMEARTH
- SIMカード [シムカード]
- SIMロック解除 [シムロックかいじょ]
- SIPP
- SIS
- SIS [シス]
- SJIS
- SL [エスエル]
- SLBM
- SLBM [エスエルビーエム]
- SLE
- SLE [エスエルイー]
- SLIP
- SMARTDRV
- SMF
- SMON
- SMP
- SMT
- SMT resistor
- SMTP
- SMU
- SNA
- SNAP
- SNAP [スナップ]
- SNOBOL
- SNP
- SNP [エスエヌピー]
- SNP [スニップ]
- SNR
- SNS
- SNS [エスエヌエス]
- SO
- SO-NET
- SOC
- SOE
- SOFA
- SOH
- SOHO
- SOLAS
- SONET
- SOP
- SOREMP
- SOS
- SOS [エスオーエス]
- SOTEC
- SOx [エスオーエックス;ソックス]
- SPARC
- SPC
- SPE
- SPECmark
- SPEEDI
- SPG
- SPL
- SPM
- SQL
- SQL Server
- SQL*Net
- SQL*Plus
- SRAM
- SRC造 [エスアールシーぞう]
- SRSV
- SS
- SS [エスエス]
- SS-user
- SSE
- SSL
- SSL [エスエスエル]
- SSPE
- SSPE [エスエスピーイー]
- SSR
- SSRI
- SST
- START
- STD
- STM
- STN
- STOL
- STOL [ストール;エストール]
- STX
- SUB
- SUBROC
- SUG
- SUSY
- SUT
- SUV
- SV
- SVA
- SVC
- SVD
- SVGA
- SVR
- SVR4
- SWAT
- SYBASE
- SYMBIOS
- SYN
- SYSTEM.INI
- Sabbath
- Sabin vaccine
- Sabrina pants
- Sacred War
- Sad Mac
- Sad to say
- Sadaparibhuta
- Saga Frontier
- Saga prefecture
- Sagami Railway
- Sagawa Express
- Sagittaria trifolia var. edulis
- Sagittarius
- Sahara
- Sahara desert
- Saigon
- Saiha
- Saikou era
- Saikyo
- Saint
- Saint Bernard
- Saint Helena butterflyfish
- Saint Kitts
- Saint Lucia
- Saint Luke's
- Saint Nicholas
- Saint-Simonism
- Saipan pygmy goby
- Saisetsu
- Saitama
- Saitama Bank
- Saitama Prefecture
- Saitama prefecture
- Saizeriya
- Sakhalin
- Sakhalin fir
- Sakhalin husky
- Sakhalin surf clam
- Sakra devanam Indra
- Sakurajima daikon
- Sakyamuni
- Salicaceae
- Salk vaccine
- Salmonella
- Salmonella typhi
- Salmonella typhimurium
- Salsola komarovii
- Salvadori's monitor
- Salvarsan
- Salvation Army
- Salvelinus
- Salwar kameez
- Samantabhadra
- Samantabhadra Contemplation Sutra
- Samoa
- Samoan mullet goby
- Samuel
- Samuel I
- Samuel II
- Samvara
- San
- San Diego
- San Francisco
- San Jose
- San Marino
- San-in region of western Honshu
- San-you region of western Honshu
- Sancho Sect
- Sandai Jitsuroku
- Sanforised
- Sanforized
- Sangen sect
- Sangerism
- Sangha
- Sanguisorba hakusanensis
- Sanja Festival
- Sankei Sports
- Sankei newspaper
- Sanmonto sect
- Sanno Shinto
- Sannou Festival
- Sannou Ichijitsu Shinto
- Sanriku earthquake of 869 CE
- Sanskrit
- Sanskrit characters
- Sanskrit multi-syllabic chant
- Sanskrit-Japanese dictionary
- Sanson-Flamsteed projection
- Sansuikaku
- Sansuiro
- Santa
- Santa Clara
- Santa Claus
- Santa Cruz
- Santa Fe
- Santa Maria
- Sanyo
- Sanyo district
- Sanzu River
- Sao Tome and Principe
- Saohime
- Sapayo cichlid
- Sapir-Whorf hypothesis
- Saposhnikovia divaricata
- Sapporo
- Saracen
- Saran wrap
- Saraswati
- Sarcandra glabra
- Sarcocheilichthys biwaensis
- Sarcocheilichthys variegatus variegatus
- Sarcocheillichthys variegatus
- Sargassum fulvellum
- Sarin
- Saros cycle
- Sarudabiko
- Sarudahiko
- Sarutabiko
- Sarutahiko
- Sasamorpha borealis
- Sasanishiki
- Saskatchewan
- Satan
- Satanic school
- Satsuma
- Satsuma Rebellion
- Satsuma and Choshu
- Satsuma biwa
- Satsuma clan
- Satsuma mock orange
- Satsuma porcelain
- Saturday
- Saturday and Sunday
- Saturday night special
- Saturn
- Saturn peach
- Saudi
- Saudi Arabia
- Saurischia
- Sauternes
- Say's law
- Sayyid
- Sayyid Dynasty
- Scan Talk
- Scandinavia
- Scandinavian
- Scandinavian countries
- Scanlon plan
- Scaramouche
- Scarus
- Scarus ovifrons
- Scatophagidae
- Scatophagus
- Schlegel's green tree frog
- Schmidt camera
- School Education Law
- School of Common Sense
- Schottky diode
- Schrodinger's cat
- Schroederichthys
- Schroedinger equation
- Schubert
- Schutzstaffel
- Schwann cell
- Sciadopitys verticillata
- Science Council of Japan
- Science and Culture
- Science and Technology
- Science and Technology Agency
- Scilla scilloides
- Scirpus hotarui
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- Sciuromorpha
- Scoliodon
- Scolopendra subspinipes
- Scorpio
- Scot
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- Scotland
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- Scripture
- Scrophulariales
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- Scutellaria indica
- Scutum
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- Sea Beam
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- Sea-Monkeys
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- Searle
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- Seasonal Affective Disorder
- Seattle
- Sebastes iracundus
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- Sebree's pygmy goby
- Second Advent
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- Second Republic
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- SecondLife
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- Sedum bulbiferum
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- See Naples and die
- See Naples and then die
- See you next week
- See you then
- Sega
- Sega Saturn
- Segway
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- Seizan sect
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- Selenotoca papuensis
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- Semang
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- Senegal
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- Serenace
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- Seriolina
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- Serratia marcescens
- Serve the powerful for your own good
- Service Bureau
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- Set a thief to catch a thief
- Setai
- Seven Deities of Good Luck
- Seven Sages of the Bamboo Grove
- Seven Sisters
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- Several men
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- Sharp
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- Shifted JIS
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- Shikoku
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- Shinto priest
- Shinto priest of lower rank than kannushi and negi
- Shinto rites
- Shinto ritual in which a shaman or priest soaks bamboo grass in boiling water and sprinkles the water on worshippers
- Shinto ritual prayer
- Shinto rituals
- Shinto scripture
- Shinto shrine
- Shinto shrine on Buddhist temple grounds dedicated to the tutelary deity of the area
- Shinto shrine precincts
- Shinto style
- Shinto wedding
- Shinto-Buddhist amalgamation
- Shinto-ryu
- Ship American policy
- Ship Safety Law
- Shirane class destroyer
- Shiranui style of grand champion's ring-entering ceremony
- Shirokiya
- Shirvanshah
- Shisui Faction
- Shitamachi
- Shitoku era
- Shiva and Brahma
- Shizuoka
- Shizuoka prefecture
- ShockWave
- Shoei
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- Shogitai
- Shogun's headquarters
- Shoki
- Shoki the Plague-Queller
- Shoku Nihon Kouki
- Shoku Nihongi
- Shokuho period
- Shoo!
- Shorin-ryu
- Shorinji Kempo
- Shotokan
- Shotoku Taishi
- Shouan era
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- Shouchuu era
- Shouei
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- Shouji era
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- Shoukyuu era
- Shouou era
- Shouryaku era
- Shoutai era
- Shoutarou complex
- Shoutoku era
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- Show me a liar
- Showa Day
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- Showa era
- Showa period
- Shrine Shinto
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- Shu
- Shu Han
- Shu-Han
- Shuchou era
- Shudra
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- Shylock
- Siam
- Siamese
- Siamese cat
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- Sibley-Ahlquist taxonomy of birds
- Sichuan
- Sichuan cuisine
- Sichuan pepper
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- Sichuan style bean curd
- Sicilian Vespers
- Sicyopterus japonicus
- Siddham character
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- Siebold maple
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- Siebold's beech
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- Siemens
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- Sierra Leone
- Siganidae
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- Sikh
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- Silence is golden
- Silenus
- Silicon Graphics
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- Silk Road
- Silk road
- Silket
- Silurian period
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- Simon bamboo
- Sinanthropus pekinensis
- Sinatra Doctrine
- Sincerely yours
- Sincerity can move heaven
- Singapore
- Singapore Telecom
- Singapore dollar
- Singapore sling
- Sinhala
- Sinhala alphabet
- Sinhalese language
- Sinhalese people
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- Sinictinogomphus clavatus
- Sinn Fein
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- Sino-Japanese War
- Sino-Japanese word
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- Sino-Tibetan
- Sino-Tibetan languages
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- Sinocentrism
- Sinologist
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- Sinterklaas
- Sioux
- Sir
- Sirius
- Sister
- Sister Princess
- Sisuphos
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- Sit!
- Six Dynasties
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- Six Ministries
- Sixteen Kingdoms
- Sixteen Kingdoms period
- Sjogren's disease
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- Skanda
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- Skill Olympics
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- Sklavenmoral
- Skopolamin
- Sky Turks
- Skylab
- Skype
- Slav
- Slave Dynasty
- Slavic
- Sleep brings up a child well
- Sleeping Beauty
- SlipKnot
- Sloane's viperfish
- Slovak
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- Small Magellanic Cloud
- Small and Medium Enterprise Agency
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- Small head but great wit
- Smalltalk
- Smaragdus pygmy goby
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- Smilax china
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- Smith's butterflyfish
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- Smith's vole
- Smithsonian Institution
- Smoking Prohibited!
- Snell's law
- Sno-cone
- Snow White
- So long
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- So that's the reason
- Sobu Line
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- Socialist Masses Party
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- Society for the Prevention of Cruelty to Animals
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- Socket 370
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- Sod that!
- Soft words pacify wrath
- SoftBank
- Sogetsu school of flower arrangement
- Sohyo
- Soka Gakkai
- Sol
- Solanaceae
- Solanum
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- Solaris
- Sold
- Soletellina diphos
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- Somali butterflyfish
- Some are wise and some are otherwise
- Son My Massacre
- Son of God
- Song
- Song of Solomon
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- Song poetry
- Song-period neo-Confucianism
- Sonosheet
- Sony
- Soon gotten soon spent
- Sorbus
- Sorbus gracilis
- Sorbus japonoca
- Sorry
- Sorry to impose but ...
- Soto Zen
- Soto school
- Sound Blaster
- Source of Suffering Desire
- South Africa
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- South America
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- South American continent
- South American dish of marinated raw seafood
- South American sea lion
- South Asia
- South Bridge
- South Carolina
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- South Dakota
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- South Kuril
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- South Pacific
- South Pole
- South Sea Islands
- South Seas
- South-East Asia
- South-west most region of Honshu
- Southeast Asia
- Southeast Asian
- Southern Buddhism
- Southern Cross
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- Southern Qi
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- Southern magnolia
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- Southwest school
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- Soviet
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- Sovietise
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- Spain
- Spam
- Spaniard
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- Spanish broom
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- Spanish influenza
- Spanish jack
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- Spanish salsify
- Spanish-American War
- Spanish-Japanese
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- Spare the rod and spoil the child
- Sparta
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- Speaker of the House
- Special Air Service
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- Speech is silver
- Spencer's goanna
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- Sphinx
- Sphyrna
- Sphyrnidae
- Spinozism
- Spiraea salicifolia
- Spirea thunbergii
- Spiritual awakening cannot be experienced with words and letters
- Spiritual enlightenment can be attained only by means of communion of mind with mind
- Spirulina
- Sports
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- Spring Festival
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- Spring and Autumn period
- Sputnik
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- Sri Lanka
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- St Bernard's lily
- St Elmo's fire
- St Luke
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- St.
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- St. Vitus's dance
- Stalinism
- Standard MIDI File
- Standing Committee for House Management
- Stanford
- Staple Food Control Act
- Star Festival
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- Star of David
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- Starbucks
- Stars and Stripes
- Stasi
- State Chamber
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- State Department
- State Minister in Charge of Economic and Fiscal Policy
- State Minister in Charge of Financial Affairs
- State Minister in Charge of Issues of Okinawa and Northern Territories
- State Minister in Charge of Postal Services Privatization
- State Minister in Charge of Regulatory Reform
- State Minister in Charge of Science and Technology Policy
- State Plan
- State Shinto
- State of California
- State of Wei
- State of the Union Address
- State of the Union message
- States-General
- Station Management
- Statue of Liberty
- Statute of Westminster
- Stealth VRAM
- Stefan-Boltzmann law
- Stefan-Boltzmann's law
- Stegastes
- Stegodon
- Stegosaurus
- Stegostoma
- Stegostomatidae
- Steiner school
- Stejneger's beaked whale
- Steller's sea cow
- Steller's sea eagle
- Steller's sea lion
- Stemmkristiania
- Sterling block
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- Sterling silver
- Stevens-Johnson syndrome
- Stevenson screen
- Sthaviravada
- Still waters run deep
- Stilton
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- Stockholm syndrome
- Stoic
- Stoic philosophy
- Stoic school
- Stoicism
- Stokes' law
- Stomiiformes
- Stone Age
- Store owner
- Storr's goanna
- Storr's monitor
- Storr's pygmy monitor
- Stradivarius violin
- Straits of Taiwan
- Strategic Arms Limitation Talks
- Strategic Arms Reduction Treaty
- StreamWorks
- Streaming SIMD Extensions
- Strelitzia reginae
- Streptococcus pyogens
- Streptococcus viridans
- Strike while the iron is hot
- Strombolian eruption
- Strombus canarium turturella
- Structural Impediments Initiative talks
- Structured Analysis
- Structured Query Language
- Stueber
- Stuff It
- Sturm und Drang
- Styracaceae
- Styrol
- Styrol condensor
- Sub-Saharan Africa
- Subaru
- Subway Series
- Suchou era
- Sudoku
- Sudra
- Sue ware
- Suez Canal
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- Suez War
- Suffering
- Sufi
- Sugata
- Sui
- Suica
- Suika Shinto
- Suiko period
- Suit your speech to the audience
- Sujahta
- Sukhavati
- Sukhavati sutra
- Sukune
- Sulculus diversicolor supertexta
- Sumatra-Andaman earthquake
- Sumatran rhinoceros
- Sumerian
- Sumida River Firework Festival
- Sumitomo
- Sumitomo Bank
- Sumitomo Mitsui
- Sumitomo Zaibatsu
- Summarize abstract-operation
- Summer Olympics
- Sumo trick of leaning back and carrying one's opponent round and out of the ring
- Sun
- Sun Bin Bing Fa
- Sun Goddess
- Sun Microsystems
- Sun Tzu
- Sun User Group
- SunOS
- SunSoft
- Sunbelt
- Sunday
- Sunday and Monday
- Sunday best
- Sunday edition of a newspaper
- Sunday school
- Sunga
- Sunkist
- Sunna
- Sunnah
- Sunni
- Sunni Triangle
- Suntory
- Super Audio CD
- Super Bowl
- Super Nintendo
- Super Tuesday
- SuperBall
- SuperBall scooping
- SuperDrive
- SuperMosaic
- Superintendent General of the Metropolitan Police
- Supplementary Volume Descriptor
- Supreme Being
- Supreme Being of tantric Buddhism
- Supreme Bliss
- Supreme Buddha of Sino-Japanese esoteric Buddhism
- Supreme Court
- Supreme Court of Judicature
- Supreme Military Council
- Supreme Orders of the Chrysanthemum
- Supreme Public Prosecutor's Office
- Supreme Soviet
- Suramgama Sutra
- Sure
- Surface Mount Device
- Surface Mount Technology
- Surinam toad
- Suryaprabha
- Susanoo
- Susanoo-no-Mikoto
- Susiddhikara Sutra
- Suspicion will raise bogies
- Sutra of Immeasurable Life
- Sutra of Immeasurable Meanings
- Suzuki
- Svalbard
- Swahili
- Swan Lake
- Swatch
- Sweden
- Sweden relay
- Swedish
- Swedish turnip
- Swertia bimaculata
- Swift is Heaven's vengeance
- Swinhoe's yellow rail
- Swiss
- Swiss Army knife
- Swiss Telecom
- Swiss chard
- Swiss guard
- Swissrama
- Switched Virtual Circuit
- Switzerland
- Swordfish
- Swords and Firearms Control Law
- Sydney
- Sydney funnel-web spider
- Sylvia
- Symbolic LinK format
- Symbolics
- Symposium
- Synchronous Data Link Control
- Synchronous Digital Hierarchy
- Synchronous Dynamic Random Access Memory
- Synchronous Transfer Mode
- Synclavier
- Synoptic Gospels
- Syrah
- Syria
- Syrian hamster
- Systee Internationale d'Unites
- System 5
- System 7
- System Application Architecture
- System V
- System for Prediction of Environmental Emergency Dose Information
- Systems Network Architecture
- Systems for Nuclear Auxiliary Power
- Szechuan
- Szechuan cuisine
- Szechuan dish of noodles covered with a sauce of sesame paste and chili oil
- Szechuan pickles
- Szechwan
- S波;エス波 [エスは]
- S状結腸 [エスじょうけっちょう]
- S造 [エスぞう]
- T
- T bandage
- T cell
- T junction
- T lymphocyte
- T square