History
Kamiiso Station opened on 15 September 1913 with the Government Railways' new Kamiiso Light Railway between Goryōkaku and the station. In 1915 a private cement-works line to Nihon Cement (now Taiheiyō Cement) began using the site, and the route was renamed the Esashi Line in 1936. With the JNR split on 1 April 1987 the station passed to JR Hokkaido; the section was electrified in 1988 and remodelled as a footbridge station. On 26 March 2016, when the Hokkaidō Shinkansen opened, JR Hokkaido transferred the Goryōkaku - Kikonai segment to the South Hokkaido Railway Company, and Kamiiso became an unstaffed stop on the renamed Donan Isaribi Railway Line.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
Two readings explain the place name: an Ainu kama-iso meaning rocks washed by waves, and a Hokkaidō convention that called the western shore of Hakodate kami, the upper, magnified by the rocky iso coastline.