Nishi-Shinjuku 3-Chōme Redevelopment

The Nishi-Shinjuku 3-Chōme Redevelopment (西新宿三丁目西地区市街地再開発) is a proposed redevelopment project in Nishi-Shinjuku, Tokyo, Japan. The proposal includes 235m tall, 65-storey apartment buildings with a total floor area of 385000 sqm, along with retail on the lower floors. If built they will be the tallest purely residential towers in Japan. As of 2024 the development remains in the planning stage, with its expected completion being in 2029

The original proposal in 1993 included one 77-story, 338 m office tower; two 66-floor, 245 m residential towers; and one 50 floor, 190 m residential tower. The 77-story office tower would have been Japan's tallest building, taking the title from the Azabudai Hills Mori JP Tower. This proposal was canceled following the 2008 global financial crisis.