As a result, 'Jaken' (snake fist) that used frog, slug, and snake and sansukumi-ken called kitsuneken (fox finger game) became popular at the end of Bakufu (government by shogunate) period.
そこでカエル・ナメクジ・ヘビの「蛇拳（じゃけん）」というものが流行し、幕末には狐拳という三すくみ拳が流行った。