京王線・井の頭線全駅で「駅ナンバリング」を導入します。 [Station numbering to be introduced on Keio Line and Inokashira Line] (PDF). News release (in Japanese). Keio Corporation. 18 January 2013. Archived from the original(PDF) on 16 June 2019. Retrieved 23 February 2013.
京王線・井の頭線全駅で「駅ナンバリング」を導入します。 [Station numbering to be introduced on Keio Line and Inokashira Line] (PDF). News release (in Japanese). Keio Corporation. 18 January 2013. Archived from the original(PDF) on 16 June 2019. Retrieved 23 February 2013.