He is an 8th dan ranked Aikikai aikido master teacher.
Takeda is among the few living people who studied directly under aikido founder Morihei Ueshiba.
[2] During his time there, he trained with master teachers including Kisshomaru Ueshiba, Sadateru Arikawa, Hiroshi Tada and Nobuyoshi Tamura.
Kenkyukai International was started by Takeda as a way to further explore Aikido.
There are currently AKI dojos in Japan, Australia, Indonesia, New Zealand, Canada, USA, Chile, Peru, Uruguay, England, Germany, France, Croatia, and Tanzania.