Zanka no Tachi, Kita: Tenchi Kaijin (残火の太刀 "北": 天地灰尽, Longsword of the Remnant Flame, North: Heaven and Earth End in Ashes; Viz "Blade of Ember, North: The World Reduced To Ashes") is a technique of Genryūsai Shigekuni Yamamoto's Bankai, Zanka no Tachi.

As Yamamoto manifests flames around the blade of Zanka no Tachi, he slashes at his target, generating an enormous wave of fire that obliterates everything it touches.