Other than the above, the fact that Shunko-den was also used as Osamedono was recorded in "Nihon koki" (Later Chronicle of Japan) (dated December 2nd of the fourth year of Jowa era) and "Sandaijitsuroku" (the sixth of the six classical Japanese history texts) (dated February 21st of the eighth year of the Gangyo era).
それ以外に、春興殿も納殿として用いられていたことが『日本後紀』（承和4年12月辛卯（2日）条）及び『三代実録』（元慶8年2月21日条）によって知られる。