せとうちOWS in 渋川 2026 takes place on Mon, Sep 21, 2026 in Tamano, Japan. The main route is 5 km.
- Date
- Mon, Sep 21, 2026
- Start
- Tamano 🇯🇵
- Distance
- 5 km
- Level
- Open to all
An open water swimming event held at Shibukawa Beach overlooking the Seto Inland Sea, offering various distance categories ranging from 625m to 5km and a one-way 3km swim.
Official event pageWhat this race demands
This 5 km open water swimming event demands sustained aerobic endurance and mental focus to manage a continuous distance in the sea.
Aerobic Endurance
Swimming continuously for 5 kilometers requires a high level of cardiovascular stamina and pacing efficiency to maintain forward momentum over an extended period.
Open Water Sighting
Navigating the marine environment of the Seto Inland Sea demands consistent sighting skills to swim efficiently without lane lines.
Your road to race day
Race day at せとうちOWS in 渋川 2026 is 4 weeks away. This is how a coach divides that time. The first phase starts now.
01Peak1 week · Aug 25, 2026 – Aug 31, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
02Taper2 weeks · Sep 1, 2026 – Sep 14, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
03Race week1 week · Sep 15, 2026 – Sep 21, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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Organising this race?