When
Jan 11, 2026
Starts at 9:30am JST
Weather
☁️ Cloudy · 4°C–17°C
Historical
· Wind 26 km/h
Website
Official website →
Event Details
Arakawa riverbed
About 10km upstream from Shin-arakawa Ohashi Baseball Field, serves as the start and finish point (From the Shin-arakawa Ohashi Baseball Field to about 1km beyond the Asaka Water Gate)
Event type
Half-Marathon
Distance
21.1 km
Surface
Road
🏅 Your Participation
Track your plan, gear, and results.
Sign in to save this race
Create your running history and track your upcoming races.