I always thought that it had something to do with Centripetal force. . . now I know better. I use this technique often when teaching someone that's having a hard time pulling the tama up straight and it always amazes them.
Oh man I loved this video! I watched it like a week or two ago, the funniest part to me was the comment sections, everyone seemed to be absolutely mind blown at his ability do get all those tricks.
Remember that most posting are probably math and physics guys; it's not really their thing but obviously it should be.
Ohhhhhh i forgot about this video! It should really get featured! The first time i saw this, last year i was geeking out, because i love the very nerdy and deep stuff about kendamas (physics, history), and this video was such a good lesson for me!
Without seeing the video I know of two ways an object can stay in flight with some direction, rotation or drag on the tail. American football/baseball vs an airplane would be the examples. Thinking it has to do with stability in flight due to being in rotation.
Strangely enough this video kinda got me into kendama! I love my science and physics and stuff and came across this video, and at the time my wife was in Japan. I asked her to bring me back a kendama, and she brought me one from a dollar store. Shortly after I got myself a Terra and the rest is history! I'm hooked!