Koto District

Japanese: 江東地区 - こうとうちく

The name of an area in eastern Tokyo. In the past, the urbanized area east of the Sumida River was loosely called the Koto district, but when the 23-ward system was implemented in 1947, the wards of Fukagawa and Joto were merged to form Koto Ward, and now many people use the name synonymously with Koto Ward. In any case, it refers to the low-lying marshland east of the mouth of the Sumida River. Urbanization has progressed here since the Edo period, and town houses with many waterways and ponds can be seen widely from Ryogoku to Kiba. Large daimyo residences were also built in various places. After the Meiji period, the area developed into an industrial district, and the living environment deteriorated.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

東京都東部の地域名。かつては隅田川の東側の都市化した地域を漠然と江東地区と呼んでいたが，1947年の23区制の施行とともに，深川，城東両区が合併して江東区ができたため，今では江東区と同義名として使う人も少なくない。いずれにせよ，隅田川河口部の東側の低湿地帯を指す。ここは江戸時代より都市化が進んでおり，両国から木場へかけては水路や池の多い町屋が広く見られた。また大きな大名下屋敷が各地につくられた。明治以後，一帯は工業地区として発展したため，生活環境が悪化した。

出典　株式会社平凡社世界大百科事典第２版について　情報

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