eventdev.osaka-triathlon.com

Osaka Castle Triathlon

Name: Osaka Castle Triathlon
Start: 2026-05-31
End: 2026-05-31
Location: Osaka

Osaka, Osaka, Japan

calendar_today 31 May, 2026

kayaking Multisports

language Official Website

About the Event

Dive into the heart of Osaka at the Osaka Castle Triathlon 2026, a premier urban triathlon designed for both elite athletes and aspiring participants. The swim takes place in the calm, historic waters of the castle moat, providing a scenic and accessible start. With convenient bike rental support packages available, the race is more attainable than ever. The fast and spectator-friendly bike and run courses weave through the city, ensuring incredible crowd support as you race towards a triumphant finish with the majestic castle as your backdrop. It's the perfect gateway to experiencing Japan's vibrant triathlon culture.

Races Offered

Sprint

May 31, 2026

straighten

Distance — 20 km 5 km

terrain

Type — Multisports

timer

-106 days remaining

Standard

May 31, 2026

straighten

Distance — 40 km 10 km

terrain

Type — Multisports

timer

-106 days remaining

Weather History

These values represent the 3-year monthly averages for May in Osaka.

thermostat Temperature

14.9° / 22.1°

wb_sunny Feels like

13.4° / 21.6°

light_mode Avg sunshine hours

8h 51m

water_drop Avg rainfall

7.5 mm

ac_unit Avg snowfall

—

air Avg wind speed

12.2 km/h (Gentle breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

High (6.0)

humidity_mid Humidity

75.1%

wb_twilight Sunrise

04:55

nightlight Sunset

18:53

About Osaka

Learn more about the host city, Osaka.

Ōsaka (大阪) is the beating heart of Japan's Kansai region and the largest of the Osaka-Kobe-Kyoto trio of cities, with a population of over 17 million people in the greater metropolitan area. With fantastic food and nightlife, great connectivity and accommodation options in every price bracket, it makes a great base for exploring the entire region.

Runner Reviews

Read what other athletes have to say about their experience at the Osaka Castle Triathlon.

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Osaka Castle Triathlon

About the Event