Battle of Shimonoseki between Choshu Domain and the Edo Shogunate (Letter by Sakamoto Ryoma) 　 Note of Approval by Sakamoto Ryoma to Kido Takayoshi (on the backside of Satsuma and Choshu Domainal Alliance Endorsement) Dated the fifth day of the second month of Keio 2(1866) Imperial Household Agency, Archives and Mausoiea Department 　 Important Cultural Property Record of Sakamoto Ryoma's Shipping Company Kaientai Kyoto National Museum 　 Battleship Yugao Niida Shrine 　 Important Cultural Property Kimono with the Sakamoto Family Crest, Worn by Sakamoto Ryoma Kyoto National Museum