JPN · 26 49er

Ibuki Koizumi / Kotaro Matsuo

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Skipper

Ibuki Koizumi

JPN

Age 30

World ranking #114|49er

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Crew

Kotaro Matsuo

JPN

World ranking #114|49er

2026 Racing Stats

49er · Port Tack Racing trackingRanked 85 of 127 qualified crews on fleet beaten

Races25

Fleet beaten41.6%

Start score+1.46

Places gained-30

Top speed35.4 km/h

Race wins1

Full stats and race log →Watch the latest race · 2026 Gdynia Test Event →49er season leaders →

Fleet beaten = share of the fleet finishing behind them, averaged over the season's races. How the numbers work

Results

20263rd of 6 – Gdynia Test Event→202671st of 93 – European Championship→

Also Sailed With

Ibuki Koizumi has also sailed with

Leo Takahashi / Ibuki Koizumi49er · 2017-2020 · 5 regattas on record

In the media

Gladwell's line: Tokyo2020 - first reflections on a yo-yo Olympic regatta Sail-World.com · Aug 2021 → Sailor Ibuki Koizumi set to represent Japan at the Tokyo 2020 Olympics waseda.jp · Mar 2020 → Tokyo2020 - Day 4 - July, 28, - Enoshima, Japan. Leo Takahashi and Ibuki Koizumi - 49er - caught mid-gybe Sail-World.com · Jul 2021 → Meet Japan’s Youth America’s Cup Team Bernews · Jun 2017 → Dream come true as Japan born sailor joins New Zealand SailGP RNZ · Nov 2024 → Youth AC Skippers On ‘Invaluable Experience’ Bernews · May 2017 →

On 49er.org

Locked on the Scoreboard – Separated on the Water31 Aug 2018