Sea— Japan

熱海オープンウォータースイムジャパングランプリ

Sep 13, 2026
Last edition date
Distances from 500m to 3km
32nd edition

At a glance

Last edition date
September 13, 2026
Distances
500 m · 1 km · 1.5 km · 1.6 km · 3 km
Where
Sea · Taga Nagahama Beach, 熱海市, 静岡県, Japan
Entry fee
31–75 €
Registration
moshicom.com
Awaiting confirmation of the next edition

About the race

This open water swimming competition is held at Taga Nagahama Beach in Atami City, Shizuoka Prefecture. The event takes place on a newly renovated 400m sandy beach known for its calm waters and excellent transparency.

Atami Castle
Atami Castle · Photo: Batholith · Public domain

Organized as an official event of the Japan International Open Water Swimming Association (JIOWSA), it features individual races ranging from 500m to 3km, as well as a 400m×4 relay. Participants of all levels, from beginners to advanced, are welcome. An ocean cleanup activity is also conducted before the race.

Tanna Fault
Tanna Fault · Photo: Batholith · Public domain

Sources: Atami Castle · 熱海マリーナ · Izusan Shrine · Tanna Fault · Koa Kannon

Course

500 m

500m loop course

1 km

500m loop course

1.5 km

1.5km loop course

1.6 km

Total 1600m

3 km

1.5km loop course

Awards

[Individual] Commemorative medals will be awarded to the 1st–3rd place finishers in each gender and age category for the 500m, 1km, 1.5km, and 3km races. [Team] Awards will be presented to the 1st–3rd place teams in each age category. *If there are 10 teams or fewer, only overall awards will be presented.

Previous editions

  • 2012Jul 8, 2012

How to get there

✈️ Search flights to HND

熱海オープンウォータースイムジャパングランプリ

Frequently asked questions

When was the last edition of 熱海オープンウォータースイムジャパングランプリ?
The last edition of 熱海オープンウォータースイムジャパングランプリ took place on September 13, 2026.
What distances does 熱海オープンウォータースイムジャパングランプリ offer?
熱海オープンウォータースイムジャパングランプリ offers 500 m, 1 km, 1.5 km, 1.6 km, and 3 km.
How much is the entry fee for 熱海オープンウォータースイムジャパングランプリ?
The entry fee ranges from 31 € to 75 €. G/P member discounts available. Late entry fees are higher. Relay price is per team.
Where does 熱海オープンウォータースイムジャパングランプリ take place?
熱海オープンウォータースイムジャパングランプリ is a sea swim. Location: Taga Nagahama Beach, 熱海市, 静岡県, Japan.
How do I register for 熱海オープンウォータースイムジャパングランプリ?
The reference page for registering for 熱海オープンウォータースイムジャパングランプリ is https://moshicom.com/147826.

Where to stay

Atami offers a diverse range of lodging options, from traditional ryokans with local hot springs to modern boutique hotels overlooking the harbor. Budget-conscious participants often look toward the 'minshuku' (family-run guesthouses) located within walking distance of the Nagahama shoreline. For those preferring more privacy, there are several hillside apartments and seasonal camping grounds near the coastal road. Expect to pay between 60 EUR and 180 EUR per night, depending on the proximity to the beach and the inclusion of regional half-board dining options.

Things to do nearby

Beyond the race, the Izu Peninsula is prime territory for marine and cultural exploration. Visitors can rent sea kayaks or SUP boards to navigate the craggy coastline near the Ajiro diving spots. For those interested in history, the hiking trails leading up to the ancient Izusan Shrine offer panoramic views of the bay. The area is also famous for its local seafood markets and geothermal 'onsen' baths, which provide a traditional way to recover after the race while overlooking the volcanic geology of the region.

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