ist ▁formulas ▁taken ▁from ▁T ao ist ▁writ ings ▁and ▁Buddh ist ▁s ut ras . ▁The ▁k u ji ▁that ▁is ▁most ▁often ▁seen ▁in ▁the ▁context ▁of ▁b udo , ▁or ▁mart ial ▁arts , ▁and ▁also ▁in ▁general , ▁consists ▁of ▁the ▁nine ▁original ▁T ao ist ▁sy ll ables ▁R in ▁P you ▁T ou ▁Sh a ▁K ai ▁Ch in ▁R ets u ▁Z ai ▁Z en ▁([ C el est ial ] ▁soldiers / fig h ters ▁descend ▁and ▁ar range ▁your selves ▁in ▁front ▁of ▁me ). ▁The ▁fact ▁that ▁the ▁T ao ist ▁k u ji ▁are ▁not ▁seen ▁in ▁Japanese ▁documents ▁and ▁writ ings ▁until ▁at ▁least ▁the ▁ 1 5 0 0 s , ▁and ▁then ▁not ▁extens ively ▁until ▁around ▁the ▁E do ▁( 1 6 0 3 - 1 8 6 8 ) ▁and ▁Me iji ▁( 1 8 6 8 - 1 9 1 2 ) ▁periods ▁indicates ▁that ▁they ▁were ▁either ▁not ▁extens ively ▁pract iced , ▁or ▁taught ▁as ▁k uden ▁( oral ▁transmission ). ▁However , ▁the ▁fact ▁that ▁so ▁many ▁k ory u ▁list ▁the ▁k u ji ▁in ▁their ▁mak im ono ▁indicates ▁it ▁must ▁have ▁been ▁considered ▁an ▁essential ▁teaching ▁( g oku - i ). ▁And ▁the ▁fact ▁the ▁k u ji ▁are ▁listed ▁in ▁numerous ▁k ob ud ō ▁mak im ono ▁from ▁the ▁ 1 5 0 0 s ▁on ward , ▁is ▁proof ▁that ▁the ▁k u ji ▁were ▁pract