2026 Kujukuri Triathlon

Kujukuri Triathlon or the 99T for short, is one of Japan’s largest triathlons and known to be the “perfect triathlon for beginners” (and those seeking PBs!). With a protected estuary swim and a straight shot on the toll roads used for both the bike and run route, it’s a flat and fast course!

The Kujukuri Triathlon is located in Ichinomiya (Chiba Prefecture) and is easily accessible from Tokyo (just 90 minutes by car). Known as Japan’s second longest beach, the area is known for its year round water activities, such as surfing and jet skiing. Ichinomiya was also the site of the 2020 Tokyo Olympics surfing competition.

Middle Distance (Half Ironman/70.3)

• Swim 1.9KM (1.2 miles)

• Bike 90KM (56 miles)

• Run 21.1KM (13.1 miles)

Standard Distance (Olympic/5150)

• Swim 1.5KM (.93 mile)

• Bike 40KM (25 miles)

• Run 10KM (6.2 miles)

To view the course map, click here (tentative)

For more information about the 2025 Kujukuri Triathlon, click here (Japanese only).

Service Charges

Individual, Relay Triathlon: 6% + ¥1,500

10K Run: 6% + ¥1,000

参加申込は外国人参加者を対象としたものです。 日本人の方がエントリーされた場合は無効となり、参加費については、返金事務手数料を差し引いた上でご返金となります。ご了承ください。