Raising a Pole, Japan 1914-18. photo By A.Davey During the 2012 Daikomyosai, Hatsumi Sensei showed us some very mysterious forms of bojutsu. He was showing things most of us had never seen before. After watching one that was very surprising to the whole crowd, Nagato Sensei turned to some of us and said, "Sensei has been reviewing his training notes from Takamatsu Sensei and he is remembering new things that he studied." This statement can be interpreted in different ways. But my own feeling about what I witnessed Soke do with the bojutsu he learned from Takamatsu Sensei, is that it is connected to 詒変の棒 Ihen no bo. So I resolved to study this when I returned home. How to study ihen no bo? If you have a basic grasp of bojutsu, then adding ihen requires tossing aside what you think you know. This is a scary starting place, because you must abandon what you thought were kihon. Why does ihen require this? 詒変の棒 ihen no bo can be defined as the deceptive or changing bo.