Koshu Hagan Ken

Kōshu Hagan Ken (交首破顔拳, Neck Twisting Face Breaking Fist).

Kōshu Hagan Ken
Name
交(こう) 首(しゅ) 破(は) 顔(がん) 拳(けん)
Kanji	交首破顔拳
Romaji	Kōshu Hagan Ken
English	Neck Twisting Face Breaking Fist
Data
School	Hokuto Shin Ken

Appears in

Original Manga

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