By accumulating the experience of fighting, he began to use a wooden sword; at about age of twenty-nine, he was using replicas of the wooden sword which he had used in the duel at Ganryu-jima Island; soon after the duel, he had lost the wooden sword and since then, he made those replicas, however, at the age of twenty-nine, he stopped fighting with swordsmen.
立会いを繰り返すうちに次第に木剣を使用するようになり、他の武芸者と勝負しなくなる29歳直前の頃には、もっぱら巌流島の闘いで用いた櫂の木刀を自分で復元し（現物は巌流島の決闘の後に紛失した）剣術に用いていた。