Part of the Banchō area, Sanbanchō (三番町) is an upscale, mostly residential district of Chiyoda, Tokyo, Japan. As of June 2020, the population of this district is 3,666 in 1,707 households. It borders the Tokyo Imperial Palace and the Chidorigafuchi moats to the east, Nibanchō and Yonbanchō to the west, Ichibanchō to the south, and Kudanminami to the north.
Like Yonbanchō, its official English spelling, Sanbanchō, does not follow the Hepburn romanization standard.
Kudanminami (九段南) is a district of Chiyoda, Tokyo, Japan, consisting of 1-chōme to 4-chōme. As of March 1, 2007, its population is 2,431.
Kudanminami is located on the northwestern part of the Chiyoda ward. The Nihonbashi River and Yasukuni-dōri Ave form its eastern and northern boundaries, respectively. It borders Kanda-Jinbōchō to the east, Gobanchō to the west, Sanbanchō, Hitotsubashi and Yonbanchō to the south, and Kudankita to the north. In addition, it borders Kitanomaru Kōen between its 1-chōme and 2-chōme. The zone is a prestigious business and residential zone.