Multisport

Xterra & Cross Triathlon

Xterra - off-road triathlon organisation. The Asia-Pacific Championships are held in Kenting, Taiwan in March.

Xterra Japan - annual races held in Nenoue-kogen, Gifu and Marunuma, Gunma. 

ITU Cross Triathlon - information on the ITU's version of Xterra

Off-Road Cycling: TnT now has a page dedicated to everything off-road, including off-road triathlon, MTB, gravel, cyclocross, and gran fondo

Duathlon (デュアスロン)

Calfman Japan - the JTU organises this winter duathlon series. TnT members attend the Kawasaki race.

MSPO Entry - entry for duathlon is through the MSPO website (in Japanese)

Aquathlon (アクアスロン)

Japan Age Group Aquathlon Championships - in 2025, the first aquathlon championship race was held in Umi no Mori, Tokyo.  The 2026 championship race will be held at the same venue on July 12th. The format is 2.5k run - 1k swim - 2.5k run. Qualification criteria are here.

JIOWSA - the Japan OWS Association organises a series of aquathon races (only Japanese information)

Swimrun (スイムラン )

ÖTILLÖ - website of the original swimrun organisation

Swimrun Japan - Japan Swimrun Association (Facebook)

Kaiyo 2017 - blog post about Japan's inaugral Swimrun race in Kaiyo, Shikoku

SwimRun Shop - online retailer of swimrun gear; they have a calendar of swimrun races around the world

Maranuma 2020 - photo album of Olivier & Youri's race in Gunma