Although the Yoshiwara (Tokyo Prefecture) was initially constructed as a residential in a suburb of Edo after the Great Fire of Meireki in 1657, it remained outside the control of the town magistrate's office and was excluded from the census taken within Edo Prefecture.
吉原(東京都)は1657年の明暦の大火の際に江戸郊外に作られた居住地区であったが、安政元年よりも前は町奉行の支配下に入っておらず、江戸御府内人口の統計から除外されてきた。