Watch Akai Katana Shin OFFICIAL DVD (2011) : Full Movie Online Free Akai Katana takes place in a parallel world that resembles Japan's Taisho period. Here, people discovered a blood sword that takes human sacrifices to unleash its mass destructive power. The empire uses these swords and sacrificed their people to conquer other countries. This DVD contains Superplays from the 3 best players of Akai Katana in the world.