Miyamori Station opened on 23 November 1915 as a station on the Iwate Light Railway (岩手軽便鉄道), a 762 mm (2 ft 6 in) light railway extending 65.4 km from Hanamaki to the now-defunct Sennintōge Station (仙人峠駅).[2] The line was nationalized in 1936, becoming the Kamaishi Line. The station was absorbed into the JR East network upon the privatization of the Japanese National Railways (JNR) on 1 April 1987. A new station building was completed in 2106.[3]
^Miyata, Hiroyuki (June 2014). 釜石線ショートヒストリー ~路線と蒸気機関車~ [A short history of the Kamaishi Line: The line and steam locomotives]. Japan Railfan Magazine (in Japanese). Vol. 54, no. 638. Japan: Koyusha Co., Ltd. pp. 24–25.
^"新たな駅舎が完成 JR釜石線宮守駅"(PDF). 宮守町地域づくりだより. Vol. 第46号. 宮守町地域づくり連絡会事務局. 2015-04-15. p. 1. Archived from the original(PDF) on 2016-07-03. Retrieved 2016-01-31.