Saiseikan was a Western-style prefectural hospital building completed in September 1871. From 1907 it was used as the main building of the municipal hospital Saiseikan. At the time of its founding, it also functioned as a medical school, under Austrian physician Lauretz teaching modern medicine education. It was designated as a national important cultural property on December 5, 1971, and was relocated and restored at Kajo Park and is now known as "Yamagata City Folk Museum". The facility is open to the public, with local history and medical materials are on display.