Akai Katana (赤い刀 Red Samurai Sword?) is a bullet hell shooter video game developed by CAVE Interactive CO. that was released on August 20, 2010 in arcades. A video game console port, Akai Katana Shin (赤い刀 真?), was released on the Xbox 360 on May 26, 2011 in Japan. Rising Star Games released the game in North America and Europe on May 15, 2012.

It is the fourth horizontal shoot 'em up game from the company, the prior three being Progear, Deathsmiles, and Deathsmiles II. The game's soundtrack was composed by Ryu Umemoto, who died shortly after the Xbox 360 version's release at the age of 37 years old.