I actually asked about this recently to some friends in Japan.
From what I understand Takeshi has decided to stop competing as he has not been happy with how the judging system rewards technical difficulty, etc. Instead he is focusing his efforts in other directions that he feels will help promote technical play. He recently ran an event called Chain Reaction in Tokyo which from what I understand was more of an ‘exhibition’ rather than a formal yoyo contest in an effort to reward tech.