Seito Gekken
Seito Gek Ken (西斗月拳, West Dipper Lunar Fist) is a martial art of the Yuezhi people. Its constellation is Seito Shi Sei (西斗四星).
Shuken studied this martial art and blended it with his Hokuto Sōke no Ken (北斗宗家の拳, North Dipper Lineage of Fists) to create Hokuto Shin Ken.