In traditional kenjutsu (swordplay), the proper posture called orishiki was executed by kneeling down with one knee next to the other foot, but in kendo, a new posture executed by raising heels with the buttocks on them was established.
伝統的な剣術では片膝を床につく折敷という礼法であったものが、剣道になった際新たに爪先立ちで踵の上に尻を載せる礼法が制定されたものである。