The urban area of Edo was called 'Gofunai,' and the official borders of Edo cartographically delineated by 'shubiki' (literally "red-ruled lines.") for the first time in 1818, and the area administered by the town magistrate's office were distinguished by 'sumibiki' (literally "black-ruled lines").
江戸の市域は「御府内」と呼ばれ、正式な区域は1818年に地図上の朱引きで、さらに町奉行の管轄する区域は墨引きで示されるようになった。