For most races in Japan, you need to be a TRIJ member. You must join the TRIJ branch for your prefecture.
1. Guide on how to update your TRIJ membership for Lawson Entry 2026 - essential if you want to enter domestic races.
2. TRIJ membership 2026 - registration is now open. Click here for Tokyo; and here for Kanagawa.
Almost all TRIJ information and registration is in Japanese. There is an English site which is rarely updated.
1. Information about 2026 race entry is here [Japanese].
2. TnT members can access a race calendar on our forum. To join TnT, go to the Contact page.
1. Explanation of the TRIJ ranking system - includes information on ranking races (sprint, Olympic and long distance), how to earn points, and how to qualify for the National Championship races at the end of the season.
2. List of TRIJ age group ranking races (Sprint distance 2026)
3. List of TRIJ age group ranking races (Olympic (standard) distance 2026)
4. List of TRIJ age group ranking races (long distance 2026)
There are National Championships for sprint, standard (Oympic), and long distance races. The sprint and standard distance races are held in MIyazaki in early November. The first Long Distance National Championships were held in Kin, Okinawa on November 16, 2025.
Japan Age Group LD Triathlon Championships - Kin, Okinawa, Nov 22, 2025 - information about the race and participation criteria (in Japanese)
Japan Age Group SD & SP Triathlon Championships - Miyazaki, Nov 15, 2026. Information about the races and participation criteria (in Japanese)
