The "DESCENTE Ise-Shima Satoumi Triathlon 2026" will be held over two days, from Saturday, July 4th to Sunday, July 5th, 2026, at a special venue at Oyahama Beach (Hamajima-cho, Shima City).
On DAY1, the first day of the competition, events will be held including the "Kids' Athlon," which is open to preschool children, and the "Aquathlon," which is open to a wide range of participants from elementary school students to adults.
Furthermore, this year will see the introduction of a new event, "Beach Triathlon Aquacross," a first in Japan.
After swimming, participants cycle along the sandy beach and then run along the shore, creating a challenging and thrilling race unique to the beach.
In addition to the EXPO (featuring corporate and organizational exhibits), the venue will also have merchandise and food booths, and a jazz live performance is planned again this year.
International athletes are also scheduled to participate on Day 2.
As part of a host town exchange program with Spain, a Spanish delegation will be visiting, and athletes from South Korea and China will also be participating, making it a truly international tournament.
You can watch fast-paced and exciting races featuring top athletes up close.
This triathlon event is a triathlon event whose main purpose is to promote people's health and the healthy development of young people, as well as to contribute to the promotion of sports and tourism in the Ise-Shima region, centered on Hamajima Town, and the revitalization of the region.
| Date | DAY1: Saturday, July 4, 2026 DAY2: Sunday, July 5, 2026 |
| Event Place | DAY 1: Special venue at Oyahama Beach DAY2 (Main Venue): Special venue at Oyahama Beach (Competition area): Hamajima-cho, Shima City, and Tasoura and Shukuura districts, Minamiise Town |
[Little Kids Athlon] 50 participants
[Aquathlon 1st-2nd grade, 3rd-4th grade, 5th-6th grade, junior high school student, general] 30 people each
[Beach Triathlon Aqua Cross: Kids A (Grades 3-4) and B (Grades 5-6)] 30 participants each
[Beach Triathlon Aqua Cross: Challenge] 40 participants
[Beach Triathlon Aqua Cross: Athletes] 40 participants
[Open Water Swim 400M] Total 20 participants
[Sprint General/U23] Total 50 participants
[Shima Tradition] 500 people
[Middle Challenge] 200 participants
[Aqua Bike/Bike Run] Total 50 participants
[Open Water Swim 3km] 50 participants
[Shima Tiger Relay] 10 teams
*The event will end once capacity is reached.
[Little Kids Athlon] Ages 3 - 2nd grade elementary school and below
[Aquathlon] Grades 1-2, Grades 3-4, Grades 5-6, Junior High School Students, General Public (15 years and older)
[Beach Triathlon Aqua Cross: Kids] A (Grades 3-4) / B (Grades 5-6)
[Beach Triathlon Aqua Cross: Challenge] Middle school students and older
[Beach Triathlon Aqua Cross: Athlete] Junior high school students and older
[Open Water Swim 400M] Junior high school students and older
[Sprint General & U23] (General) 24 years and older (U23) 15 to 23 years old (as of December 31, 2026) *Junior high school students are not eligible, 2026 Triathlon Japan registered member
[Shima Traditional Distance] Ages 18 and over (as of December 31, 2026) *High school students not allowed, must be a registered member of Triathlon Japan for 2026.
[Middle Challenge] Ages 18 and over (as of December 31, 2026) *High school students are not eligible, must be a registered member of Triathlon Japan for the 2026 fiscal year.
[Aqua Bike] Ages 15 and up (as of December 31, 2026) *Middle school students not allowed, 2026 Triathlon Japan registered member
[Bike Run] Ages 15 and over (as of December 31, 2026) *Middle school students not allowed, 2026 Triathlon Japan registered member
[Open Water Swim 3km] Ages 15 and up (as of December 31, 2026) *Middle school students not allowed
[Shima Tiger Relay] Ages 15 and over (as of December 31, 2026) *Junior high school students are not eligible.
*February 2, 2026 (Monday) 12:00 to May 29, 2026 (Friday) 23:59
[Morning Session] Little Athlon, Aquathlon (Elementary School Students), Aqua Cross (Kids A & B)
| Start time | End time | Message |
| 9:00 | 10:10 | Transition setting (morning session only) |
| 9:30 | 10:00 | Competition briefing (morning session only) |
| 10:10 | 12:00 | Competition and awards ceremony |
[Afternoon Session] Aquathlon (Junior High School Students & General Public), Open Water Swimming 400M, Aqua Cross (Athlete Challenge)
| Start time | End time | Message |
| 13:00 | 13:30 | Competition briefing |
| 13:30 | 14:00 | Transition Open |
| 14:15 | 15:55 | Competition |
| 16:00 | 16:30 | Awards Ceremony (Afternoon Session) |
| 16:00 | 17:00 | Open Water Swimming (OWS) Workshop for Beginners |
| 11:00 | 17:00 | EXPO Participant Gift Exchange Center opens |
| Start time | End time | Message |
| 7:30 | 9:10 | Transitions open (sprints from 07:30 to 09:20) |
| 9:30 | Start of competition (excluding sprints) | |
| 14:30 | End of competition | |
| 12:30 | 13:00 | Awards Ceremony (OWS, Aqua Bike, Sprint) |
| 14:30 | 15:00 | Awards ceremony (Bike Run, Middle Challenge, Shima Tradition Distance, Shima Tradition Relay) |
| 8:00 | 15:30 | EXPO Participant Gift Exchange Center opens |
| 15:00 | 16:00 | Main venue cleanup volunteer (including dismantling and tidying up) |
*The schedule may change depending on the weather and progress on the day.
In such cases, an announcement will be made at the venue.
*The awards ceremony will be held after each category has finished and preparations are complete.
*Warming up for swimming is possible up to 5 minutes before the start.
Please do so on your own so as not to disrupt the progress of the competition.
*Traffic restrictions will be in place on surrounding roads and National Route 260 leading to Shukura on Day 2.
