Races Marathon · Tokyo, Japan
Tokyo Marathon
Tokyo Marathon is a flat marathon in Tokyo, Japan, held each March. Broad, flat city boulevards with a handful of out-and-back sections to see the field. Early March is usually cool, roughly 5-13C. Flat courses like Tokyo's reward metronomic pacing — the danger is going out faster than goal pace because it feels cheap early.
Page rebuilt 2026-10-01 · race facts not independently verified — confirm dates and entries on the official race site
When
March
every year
Course
flat
Marathon
Conditions
Early March is usually cool, roughly 5-13C.
Racing this course well
Broad, flat city boulevards with a handful of out-and-back sections to see the field.
Flat courses like Tokyo's reward metronomic pacing — the danger is going out faster than goal pace because it feels cheap early.
Pick your goal for Tokyo
Pace charts, weekly structure and timelines for the most common marathon goals:
We don’t hold a confirmed date for this edition, so any countdown comes from the date you enter here.
Build your training around Tokyo Marathon.
RunV works backwards from race day to today and rearranges the weeks when life interrupts. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the Tokyo Marathon?
- It is held each March in Tokyo, Japan. Check the official Tokyo Marathon site for the exact date and entry windows.
- Is the Tokyo Marathon course flat?
- Broad, flat city boulevards with a handful of out-and-back sections to see the field.
- How should I train for the Tokyo Marathon?
- Match your preparation to Tokyo Marathon's profile and the March weather, then protect consistency — RunV's adaptive plan recalibrates after every run so one bad week never derails the block.
Not sure what to target? Predict your marathon time from a recent race →
More marathon races
Build for Tokyo — around your actual life
RunV engineers your block backwards from race day in March — and rebuilds it every time training doesn't go to script.
