Hokuto Zankai Ken

Zankai Ken
Name
残(ざん) 悔(かい) 拳(けん)
Kanji	残悔拳
Romaji	Zankai Ken
English	Remorse Fist
Data
School	Hokuto Shin Ken

(残悔拳 Remorse Fist) is a Hokuto Shinken technique which stabs the thumbs into an opponent's temples, striking the Tōi pressure point. After this, the victim is given three seconds (seven in the anime) of regret before their body explodes.

Appears in

Original Manga

Kenshiro uses it on Spade on page 87 of the 1st volume, titled "A Cry from the Heart" (心の叫びの巻, Kokoro no Sakebi no Maki)