Koichi Tohei was a student of Morihei Ueshiba, the founder of Aikido. In his own teaching, Tohei developed four principles to help guide his students:
1) Keep one point;
2) Relax completely;
3) Keep weight underside;
4) Extend Ki.
(https://www.ki-aikido.de/en/v/kisoc/material/principles.php)
I’d like to comment on his four principles, and ...