Not to be confused with the actual Battle of Kawanakajima. Kawanakajima no Tatakai (川中島の合戦, Battle of Kawanakajima) is a war simulation title based on the Battle of Kawanakajima. This was the first video game sold by Koei founder Kou Shibusawa who initially made it as a hobby. For its 35th anniversary, a modified port of the game will be included in the Treasure Box edition of Sangokushi 13 Power-Up Kit. It contains two modes: the original version and a remake with enhanced graphics as well as easier gameplay.