News

Mar 30, 2024 - Entries open for Irago Olympic & middle distance triathlons

Mar 28, 2024 - Entries now open for Mt Fuji Olympic distance triathlon

Mar 18, 2024 - New links to cycle route planning websites are now on the "Bike" page of this website. Rolling Japan and bikemap.net are in English; Tabi-rin is in Japanese.

Feb 22, 2024 - Entries now open for Niijima Olympic Distance Triathlon, part of the Tokyo Island Series of triathlons, running races, and OWS

Feb 8, 2024 - Ironman Gurye, S. Korea - entries open Feb 15th

Jan 25, 2024 - Nagaragawa 102 Middle Distance Triathlon - entries open at noon today.

Jan 21, 2024 - Ainan-cho Triathlon - Olympic race in a beautiful part of Ehime Prefecture on June 1st.  Entries here.

Jan 21, 2024 - 1st Calfman Signature Duathlon - a duathlon held on February 18 in a small bayside park in Kawasaki,  just south of Haneda Airport. Entries close on January 31st. This was previously part of the Calfman duathlon series, which seems to have been discontinued. 

Jan 20, 2024 - Mt Fuji Hill Climb will be on Sunday, June 2nd. Entries open on Feb  9th. This is a huge race with 8,500 cyclists riding 24 km up to the 5th station. 

Jan 14, 2024 - Entries open today for Goto Baramon King long & middle distance races held on the beautiful island of Goto off Nagasaki. 

Jan 10, 2024 - Entries for the following triathlons are now open: Asia Triathlon Championships, Hatsukaichi (April 21), Nanki Shirahama (May 19), Osaka Castle (May 26). Suwako Middle Distance (June 23), Nojiriko (July 7)

Nov 7, 2023 - The Multisport World Championships 2024 have been announced. They will be in Townsville, Queensland, Australia, Aug 15-25, 2024. Events include duathlon, aquathlon, and long-distance triathlon.

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Regular Training Sessions

We organise training sessions through our forum and LINE groups.

Wednesday, 19:15 - TnT members join Namban Rengo track workout

Friday, 06:00 - bike & run hill repeats near Nigerian Embassy, Tokyo [Info on TnT Forum]

Saturday 10:00 - Open Water Swimming, Hayama koen

Sunday - Oi-futo cycle training (to be decided)

Members' Forum

The Triathlon in Tokyo Forum is our online community board where members can share triathlon banter, race reports, training info, and more. If you would like to join TnT and use the forum, please contact us here

TnT members-only Strava Club

You can view other members' Strava activity and see how you compare. Click here and request to join.

Who We Are

Triathlon in Tokyo (TnT) is a group of amateur multisport athletes based in and around Tokyo. We take part in everything from sprint through to iron-distance triathlon, as well as duathlon, aquathon, and swimrun. We have no formal structure, meetings, or meets; instead we organise informal training sessions through our members-only forum and various LINE groups. We do, however, have a team uniform which is available through the World Triathlon Store, along with a range of team wear.  We also receive discounts and support from our sponsors listed below.

TnT welcomes athletes of all abilities, from complete beginners to veterans. Many new members have progressed rapidly from their first Olympic distance triathlon to full Ironman in just one or two years. Members have competed at the ITU Age Group World Championships and the legendary Kona Ironman Worlds. If you are interested in joining us, please get in touch through the contact page.

Triathlon in Tokyo Annual Party 2019