https://youtube.com/shorts/_1OrvZf2Wvo?feature=share
昔、剣道やってたけど、その頃にこれを知りたかったな
https://youtube.com/shorts/H0FVDx4-RS8?feature=share
https://youtube.com/shorts/Q16ERqXE3lA?feature=share
https://youtube.com/shorts/eNpoowakNag?feature=share
https://youtube.com/shorts/XvJ0dNTJJdQ?feature=share
関連
