Tessaiga (The Sword of Cleaving / Life)
Fang of the Great Dog General · Human Protection Barrier
Forged by the swordsmith Totosai from the fang of Inuyasha's father. Normally resembling a rusty, dull katana, Tessaiga transforms into a giant bladed fang when wielded to protect humans. It acts as a barrier suppressing Inuyasha's violent, demon-blood madness.
Tessaiga Evolution Tiers (Kaze no Kizu to Meido)
SPOILER!
Wind Scar · Backlash Wave · Red & Diamond Blades
Tessaiga masters new forms by absorbing enemy demonic power:
1. Kaze no Kizu (Wind Scar): Slices the seam where demon demonic aura collides.
2. Bakuryuha (Backlash Wave): Reverses enemy demon attacks into a destructive vortex.
3. Red Tessaiga: Smashes demonic barrier shields.
4. Kongo-tsoha (Diamond Spear Barrage): Fires sharp diamond projectiles.
5. Meido Zangetsuha: Opens a rift directly to the Underworld.
Sesshomaru: Tenseiga & Bakusaiga
SPOILER!
Sesshomaru's Blades · Sword of Life & Destruction
Inuyasha's full-demon older brother Sesshomaru originally wielded Tenseiga (a sword that cannot cut the living, but resurrects the dead). After letting go of his obsession with Tessaiga, Sesshomaru manifested his own blade: Bakusaiga, a sword whose golden decomposition wave spreads continuously through flesh.