114th Kaseki Arakawa Half Marathon (第114回 季節の荒川ハーフマラソン)

Join us on October 3, 2026 for an exciting race that offers age-group rankings every ten years. The top finisher in each category will receive a special prize – free entry to the next championship event. This year's edition continues with our popular stamp card system, where collecting three stamps earns you one complimentary race entry.
The atmosphere is electric as participants of all ages compete for recognition and rewards. Whether you're racing alongside seasoned veterans or young newcomers, there’s plenty of motivation to push yourself to your limits on the day. The scenic course offers a mix of terrain that challenges runners while showcasing some stunning local landscapes. Don't miss out on this opportunity to be part of an inclusive community event where everyone can celebrate their achievements and look forward to future races with new incentives.
As you step up to the starting line, take pride in knowing your efforts could earn you a spot at next year’s championship without having to pay for entry. This unique feature adds excitement and continuity to our racing calendar, encouraging runners of all ages to keep pushing their boundaries and setting personal bests each season.