館山若潮マラソン

How to enter

Online entry via RUNNET only. Bibs are mailed in advance to the address provided at registration.

Entry platform

RUNNET (runnet.jp) — free registration required. The site is in Japanese and may present language and address-field hurdles for overseas runners.

What you need

Must be able to complete the course within the time limit (full marathon: 6 hours; net time under 5h50m). No explicit overseas restriction stated, but a valid delivery address for bib mailing is needed.

Payment

Credit card, convenience store payment, or ATM (bank transfer) via RUNNET. A handling fee applies (6% for entries over ¥4,000).

Bib pickup

No on-site bib pickup — bibs and timing chips are mailed in mid-January to the address registered at entry. There is no race-day reception desk.

Entry period

General entry: 14 September – 13 November 2025. Furusato-nozei (donation) entry: 12 September – 31 October 2025.

On race day

An English version of the Athlete Guide is available on the official website. The race has an ENGLISH page on the site.

Notes

Participation prizes (towel, etc.) are distributed on race day at the venue and are not mailed. No-show refunds or entry transfers are not permitted under any circumstances.