Kakio Station was opened on 1 April 1927. It was promoted to a Semi-Express stop in 1947, and a "Sakura Semi-Express" stop in 1948. It became a "Rush Hour Semi-Express" stop in 1960. The use of the trunk line was discontinued in 1977, and the station redesignated a "Section Semi Express" stop in 2004.
Station numbering was introduced in January 2014 with Kakio being assigned station number OH24.[1][2]
^"2014年1月から駅ナンバリングを順次導入します!" [From January 2014, station numbering will be introduced sequentially!] (PDF). odakyu.jp (in Japanese). 24 December 2013. Archived from the original(PDF) on 26 October 2022. Retrieved 9 January 2023.
^Kusamichi, Yoshikazu (28 December 2013). "小田急グループ、鉄道から海賊船まで通しの駅番号…2014年1月から順次導入" [Odakyu Group, station numbers from railways to pirate ships, Introduced sequentially from January 2014]. Response Automotive Media (in Japanese). Archived from the original on 22 June 2020. Retrieved 10 January 2023.
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