The 16th Izu-Oshima Marathon

How to enter

Online entry via one of three entry platforms (including Sports Entry / RUNNET). A package tour (ferry + accommodation + entry) is also available through Lawson Travel.

Entry platform

Sports Entry (tel: 0570-039-846), RUNNET, and one other unnamed site; package tours via Lawson Travel

What you need

Participants must be 18+ (full/half) or middle school age and above (10km) as of race day. A domestic mailing address appears needed as race documents (bib envelope) are posted to the participant by mail one week before the race.

Payment

Entry fees: Full Marathon ¥9,400 / Half Marathon ¥7,400 / 10km ¥5,400. No refunds for cancellations or race cancellations due to weather/transport issues.

Bib pickup

Race documents are mailed to the participant about one week before the race. The envelope must be presented at the venue to collect the bib. In-person pickup is on the day before (Dec 4, 14:00–16:30) or race morning (Dec 5, from 6:00).

Entry period

2026年6月6日(土) 0:00 ～ 2026年11月15日(日) 23:59 (or until the 750-person capacity is reached)

On race day

Medical station, AED, nurses, paramedics, and first-aid teams patrol the course. Sports accident insurance is included. Free hot fish soup and island-resident food stalls at the finish; free hot spring bath voucher; free running clinic by a former Japan national athlete.

Notes

The race is held on Izu Oshima island (Tokyo), accessible by ferry from Tokyo (Takeshiba) or by air. Overseas runners should note that bibs are mailed to a Japanese address; if you lack one, you may need to arrange the package tour or a domestic proxy address. Ferry cancellations due to weather are possible; the organiser strongly advises arriving with a buffer day. No refunds if transport disruption prevents attendance.