The station consists of a single side platform serving one bi-directional track. The station is unattended and there is no station building, but only a shelter on each platform. [2]
Kumonmyō Station opened on April 30, 1912 as Ido Station (井戸駅) the Kotohira Electric Railway. It was renamed Idogawa Station (井戸川駅) in 1915. On November 1, 1943 it became a station on the Takamatsu Kotohira Electric Railway Kotohira Line due to a company merger. On September 30, 1952 it was renamed to its present name.
^Kawashima, Ryōzō (2013). 図説: 日本の鉄道 四国・九州ライン 全線・全駅・全配線・第2巻 四国西部エリア [Japan Railways Illustrated. Shikoku and Kyushu. All lines, all stations, all track layouts. Volume 2 Western Shikoku] (in Japanese). Kodansha. pp. 8, 64. ISBN9784062951616.