Blue River Marathon Tokyo – Half Marathon takes place on Sat, Nov 28, 2026 in Katsushika, Tokyo, Japan. The main route is 21.1 km.
- Date
- Sat, Nov 28, 2026
- Start
- Katsushika, Tokyo 🇯🇵
- Distance
- 21.1 km
- Level
- Open to all
Your 9-week plan to Blue River Marathon Tokyo – Half Marathon
The Build phase starts this week. Built around your fitness and adjusted every day as your form changes; attach the course and it prepares for the climbs too.
Build my planFree to start · No credit card
BLUE RIVER MARATHON 2026 in TOKYO is a charity run at Horikiri Mizube Park in Katsushika, with a 21.0975 km half marathon plus quarter-marathon, 5.27 km, half-relay and 1 km pair-run options.
What would it take you?
Pick the level closest to yours for an estimate of finish time on this course and the training a solid preparation needs.
Estimated finish
1:45–2:10
Peak-week training
5–7 h/week
A model estimate from distance, climbing and level, not a promise. Conditions, drafting and pacing move it.
IntervalCoach turns those weekly hours into a concrete plan built around your actual fitness. Start with this race as your goal
Your road to race day
Race day at Blue River Marathon Tokyo – Half Marathon is 9 weeks away. This is how a coach divides that time. The first phase starts now.
01Build3 weeks · Sep 27, 2026 – Oct 17, 2026
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
02Peak3 weeks · Oct 18, 2026 – Nov 7, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
03Taper2 weeks · Nov 8, 2026 – Nov 21, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
04Race week1 week · Nov 22, 2026 – Nov 28, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Frequently asked questions
When is Blue River Marathon Tokyo – Half Marathon?
Blue River Marathon Tokyo – Half Marathon takes place on Sat, Nov 28, 2026 in Katsushika, Tokyo, Japan.
How long is Blue River Marathon Tokyo – Half Marathon?
The main route is 21.1 km.
Who is Blue River Marathon Tokyo – Half Marathon for?
Blue River Marathon Tokyo – Half Marathon is open to all participants.
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