Regular Training Sessions

We organise training sessions through our forum and LINE groups.

Tuesday, 18:45 -  Zwift [Info on TnT Forum]

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

Thursday, 18:45 - Zwift [Info on TnT Forum]

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

Saturday / Sunday mornings - open water swimming, Hayama


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

Nov 6, 2023 - Ironman 70.3 Langkawi, Malaysia, Oct 12, 2024 - entries now open

March 22, 2023 - Off Road Triathlon in Tahara will be held on Sept 30, 2023. The venue is Shiroya Seaside Park near Toyohashi (the same as Ironman 70.3).  Entry information is not yet available.

March 22, 2023 - Entries are open for Sai no Kuni Triathlon at Lake Watarase, Saitama. There are sprint, standard, and middle distance races.

March 9, 2023 - Entries are now open for Xterra Marunuma on Sept 17. Early bird entries until March 31st. English entry available. 

Feb 26, 2023 - Sado International Triathlon entries open March 1st. Middle and long distance races will be held on Sept 3rd.

Feb 23, 2023 - Tour de Kyushu is a new UCI cycle stage race to be held October 6th - 9th.

Feb 13, 2023 - List of middle and long distance triathlons in Japan, created by Japan Multisport

Feb 12, 2023 - Entries for Mt Fuji Triathlon , Kawaguchiko will open on Mar 22, noon. The race will be on September 10th.

Jan 11, 2023 - Entries are now open for Xterra Nenouekogen on May 22. As well as spring and full-distance, there will be a new long-distance race this year. Japanese and English entry websites.

Nov 1, 2022 - JTU Registration - 2023 JTU registration is now open. You need to have JTU registration for most races in Japan. 

Oct 27, 2022 - Miyajima Woodman Triathlon - this unique race will be held for the last time on June 18, 2023. Entries close April 1st.

Dec 30, 2021 - Cycle Routes ; the TnT Website has a new section for downloadable cycle routes ridden and recommended by TnT members.

Older Posts

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