History
Mori-Miyanohara Station opened on 19 November 1925 with the Iiyama Railway's extension from Nishi-Ōtaki, taking its name from two villages on either side of the Chikuma River. It became a through station on 1 August 1927 when the line was extended further into Niigata. Nationalised on 1 June 1944, freight ended in October 1982 and baggage in February 1984. With JNR privatisation on 1 April 1987 it passed to JR East, and a new station building was completed in April 2004. Now the northernmost station in Nagano Prefecture, it is also the boundary between JR East's Nagano and Niigata branches.
History summarized from Japanese & English Wikipedia · last reviewed 2026-06-09.
Notes
On 12 February 1945 the station recorded a snow depth of 7.85 metres, the highest measured at any JR station; a marker pole on the platform still notes the record.