Seito Gekken (西斗月拳, West Dipper Lunar Fist) is a martial art of the Yuezhi disciples who serve their god. Its constellation is Seito Shi Sei (西斗四星).

Shuken studied this martial art's Keiraku Hikō and blended it with his Hokuto Sōke no Ken (北斗宗家の拳, North Dipper Head Family Fist) to create Hokuto Shin Ken.