Yugake is the gear which uniquely developed with Japanese way of shooting that had applied the way of setting of 'Menggu' (Mongol) style (right figure. 3) where a bow was drawn with a thumb since Japanese bow appeared and improved repeatedly with the changes of schools in successive periods, shajutsu (technique to shoot a bow) or yumiire(or kyusha, ceremonial shooting) and have become a present form.
ユガケは和弓の登場時から親指に弦を掛け弓を引く「蒙古式（右図Fig.3）」の取り掛けをする日本の射法に合わせて独自に発展した道具であり、時代毎の流派や射術、弓射のあり方の変遷に伴いユガケもその時代毎に改良が重ねられ、現在の形に至る。