About JTK

JTK is a karate organization led by Masahiko Tanaka and Yuko Takahashi.
JTK is an organization open to everyone who loves karate.
JTK is an organization that allows you to be registered while still belonging to another organization.
There are two registration options available with JTK: personal registration and group registration.
There are also two options for personal registration: headquarters members and friendship members.
When registering as a group, the members of that group become branch members of JTK.

3 features of JTK

  • Online
  • App
  • Certificate

Online class

Headquarters members can participate in online lessons offered by JTK Headquarters. You can find monthly zoom meeting ID and passcode on INFO page of our website “JTK World “.

Let’s practice karate with students at the headquarters!
This photo is of one of our members from France who participates in our online lesson every week.

HQ online

Karate app JTK World

For all members, JTK provides various services through the app.
Monthly letter from headquarters Instructors.
Various videos.

Training recording function.
Practice and train a lot to win your own trophies.

JTK world

Certificate issuance

Headquarters and branch members can obtain JTK Dan and Kyu grades.

The characters of DAN/KYU and the signature on the certificates are copies of the hand-written characters of the Supreme Master Masahiko TANAKA.



2-20-13-2 Akasaka, Minato-ku, Tokyo, Japan
+81 3-6277-8264(To Mr.Kashiwagi)5 minutes on foot
Tameike Sanno Station
Akasaka Station
Roppongi 1-chome