Samurai Calculator. Calculator designed with the image of the Daimyos(feudal lords: a. K. A. Sengoku Busho) from the Sengoku(warring states) period in Japan. The initial release version contains one Busho theme(Oda Nobunaga). More themes are planned to be gradually added with the future updates. ( 2015/01/19 - New Busho theme "Takeda Shingen" is added. ).