靖国神社
Kaikosha donated its old private libraries to Yasukuni Shrine and in 1999 the collection was opened to the public as the Yasukuni Archives. Yasukuni Shrine says that books donated from Suikokai, the naval equivalent of Kaikosha, are also included in the collection. It is explained on Yasukuni's official website that “The library maintains research material from the time that the souls that are resting at Yasukuni Shrine were killed in action and its purpose is to formally recognize their upstanding legacy as well as contribute to future research”.