In 1601, he became a sword instructor to Hidetada TOKUGAWA, who was later to become the second Shogun; he subsequently served the third Shogun, Iemitsu TOKUGAWA, also as a sword instructor.
慶長6年（1601年）にのちの2代将軍・徳川秀忠の剣術師範役となり、ついで3代将軍・徳川家光にも剣術師範として仕えた。