The Toranomon (Tiger Gate), demolished in the 1870s
Literally meaning "Tiger Gate", Toranomon was the name of the southernmost gate of Edo Castle. The gate existed until the 1870s, when it was demolished to make way for modern developments. The Toranomon incident (虎ノ門事件, Toranomon Jiken) was an assassination attempt on the Prince Regent Hirohito of Japan on 27 December 1923 by communist agitator Daisuke Namba.
^"Introduction to JAS." Japan Air System. November 7, 1996. Retrieved on January 7, 2011. "No. 37 Mori Bldg., 3-5-1 Toranomon, Minato-ku, Tokyo, Japan." Address in Japanese: "東京都港区虎ノ門三丁目5番1号(第37森ビル)"
^"Company Profile." (Archive) Fuji Fire and Marine Insurance. Retrieved on August 26, 2013. "Headquarter [sic] Tokyo head office: Kamiyacho MT Bldg, 4-3-20 Toranomon, Minato-ku,Tokyo, Japan" - Information in Japanese (Archive) "所在地 東京本社 〒105-8622 東京都港区虎ノ門4丁目3番20号 神谷町MTビル"