| It started with the requisition of Sengokufu (one laborer per yakudaka (salary paid in accordance with the rank of one's post) of 1000 koku (approximately 278 cubic meters of crop yields)) for the construction of the castle town of Edo-jo Castle. |
江戸城下町建設のために、千石夫（役高1000石につき1人の人足）を徴発したことに始まる。 |