15th Adachi Friendly Half Marathon

Adachi, Japan

Sunday, December 20, 2026

Choose your distance

Half Marathon· €38

Distance

21.1km

Start Time

11:00

Cutoff

3 hours

Terrain

Road

Difficulty

Beginner

Max Runners

4,300

Overview

A certified half marathon on the Arakawa riverbed left bank that must be completed within three hours. Entrants are grouped by age and by JAAF registration status.

Flat riverside course on the Arakawa riverbed left bank
Views of Mt Fuji and Tokyo Skytree
Certified courses for the half marathon and 10km

The practical side

Qualification

Half marathon and 10km entrants must have completed junior high school (aged 15 or over) and be able to finish within the time limit (3 hours for the half, 2 hours for the 10km). JAAF-registered runners must have their registration details recorded in their RUNNET member profile.

Terrain

Flat riverside path along the left bank of the Arakawa, with views of Mt Fuji and Tokyo Skytree.

Route

Starts on the Arakawa riverbed left bank upstream of Senju Shinbashi and finishes downstream of Senju Shinbashi near Takasago Baseball Ground.

Good to know

€38

per person · entry fee

Adachi, Japan

Sunday, December 20, 2026

Qualification required: Half marathon and 10km entrants must have completed junior high school (aged 15 or over) and be able to finish within the time limit (3 hours for the half, 2 hours for the 10km). JAAF-registered runners must have their registration details recorded in their RUNNET member profile.

Adachi Friendly Marathon Organising Committee / Adachi Ward Athletics Association

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