http://en.wikipedia.org/wiki/Sakamoto_Ry%C5%8Dma
http://www.kochi-bunkazaidan.or.jp/~ryoma/english1.htm
http://wiki.samurai-archives.com/index.php?title=Sakamoto_Ryoma
_ [Meiji restoration, Japan]Ryoma Sakamoto meets Kaishu Katsu
http://www.youtube.com/watch?v=VmVE_0ZWt-Q
_ Ryoma Sakamoto assassination
http://www.youtube.com/watch?v=LFXQ20hpcRk