History
Kasuga Station opened on 30 June 1972 with the inauguration of Toei Subway Line 6 between Hibiya and Sugamo; the line was renamed the Mita Line on 1 July 1978. On 12 December 2000 the Toei Ōedo Line was completed and a second platform pair opened, making Kasuga a transfer station; joint transfer operations also began that day with TRTA (now Tokyo Metro) Kōrakuen Station via a Toei-managed connecting concourse. Platform doors entered service on the Mita Line platforms in 2000 and on the Ōedo Line platforms in 2012. A fare-gate transit service through Kōrakuen began on 16 March 2013. New Exit A7 and the Seiwa Park concourse opened on 4 July 2020.
History summarized from Japanese & English Wikipedia · last reviewed 2026-06-09.
Where the English and Japanese sources differ, this account follows the Japanese source.
Notes
The district name "Kasuga" comes from the holding of Kasuga no Tsubone, the influential 17th-century wet-nurse and political adviser to the third Tokugawa shōgun Iemitsu; the planning name for the station was the more literal Kasuga-chō.