Zangetsu (n) (残月 Jap. "morning moon" or "moon visible in the morning") may refer to:
- A weapon used by the character Ichigo Kurosaki in the Bleach series
- A Knightmare Frame mecha piloted by Kyoshiro Tohdoh in the anime Code Geass
- A move performed by the character Hitomi in the Dead or Alive fighting game series