Tokyo 2020 Olympic Organizers Set Official Open Water Test Event Date

Organizers of the Tokyo 2020 Olympic Games have announced the official test event for open water swimming (marathon swimming, in Olympic parlance). The event will be held on August 11th, 2019 as part of the READY STEADY TOKYO program – the branding for the mandatory Olympic venue test events.

This was one of a number of tweaks made to the test event schedule late last week by the organizing committee, including the announcement of the official 3-on-3 basketball test event.

Open water swimming, and the test event will be held at Tokyo’s Odaiba Marine Park. The venue seats 5000 participants. That was set to be the site of the open water swimming at the 2018 Pan Pacific Championships, but those races were moved because they overlapped with water quality tests.

Water tests conducted in the summer of 2017 revealed that day-to-day water quality at Odaiba varied significantly depending on weather conditions, particularly on whether or not it had rained. Of the samples collected over the test period, just 10 days saw the marathon swimming water quality standards meet those specified by FINA, while only 6 days saw the triathlon quality standards meet those specified by the International Triathlon Union (ITU).

Tokyo 2020 organizers have pledged to keep water clean and safe ongoing, however, time is running out for the water quality to be improved by August, the timeframe of the Pan Pacs. In late 2018, Tokyo officials announced that they had been able to use underwater triple-layer screens to improve the water’s quality.

Over half of the Olympic field in the 10km swims will be set this summer at the World Championships, before the test event.

Full Aquatic Test Event Schedule:

  • Water Polo – October 5th-7th, 2018 (during the Japan Swimming Championships)
  • Water Polo #2 – April 11th-12th, 2020 (Test Match)
  • Marathon Swimming – August 11th, 2019 (READY STEADY TOKYO – Aquatics (Marathon swimming))
  • Swimming – April 14th-15th, 2020 (READY STEADY TOKYO – Aquatics (Swimming))
  • Diving – April 21st-26th, 2020 (FINA Diving World Cup)
  • Artistic Swimming (Synchro) – April 30th-May 2nd, 2020 (FINA Artistic Swimming Olympic Games Qualification Tournament 2020)


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About Braden Keith

Braden Keith

Braden Keith is the Editor-in-Chief and a co-founder/co-owner of He first got his feet wet by building The Swimmers' Circle beginning in January 2010, and now comes to SwimSwam to use that experience and help build a new leader in the sport of swimming. Aside from his life on the InterWet, …

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