Wow this is an old thread i donīt even remember starting.
I have been training for Shishiya sensei since my first seminar with him in 2002 and have also travelled to Japan to train for him.
Shishiya sensei is a excelent teacher and a truly wonderfull man. I advice everyone who has a chance to experience his unique Aikido to do so.
And by the way Jorge, you can see me taking ukemi for sensei in some of those videos.