Abacus and Sword(武士の家計簿)is a December 4, 2010 Movie directed by Yoshimitsu Morita and produced by Masayuki Motomochi Japan.
Set during the Meiji Restoration period of Edo era Japan, Naoyuki ( Masato Sakai ) belongs to the 8th generation of the Inoyama family, a wealthy family known for finance & accounting. He is also a gifted mathematician and uses the abacus with extreme skills. Naoyuki works under the declining Kaga domain. Because of this, Naoyuki and his wife Koma ( Yukie Nakama ) suffer hardships as their stature and wealth dissipates.