JPNRunningRoad10K · 10 km / 6.2 miHalf · 21.1 km / 13.1 miMarathon · 42.2 km / 26.2 mi

Izu Oshima Marathon

Oshima, Tokyo · JPN

When is the next Izu Oshima Marathon?

Sat, 5 Dec 2026

3 distances · see start times below

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Time limits and cut-offs

Some events have a finishing deadline or intermediate checkpoint cut-offs. These can vary by distance, start wave and edition.

Half · 2026-12-05: Not yet verified for this edition. Check the official race instructions.
Marathon · 2026-12-05: Not yet verified for this edition. Check the official race instructions.
10K · 2026-12-05: Not yet verified for this edition. Check the official race instructions.

About Izu Oshima Marathon

Izu Oshima Marathon is a running event in Oshima, Tokyo, Japan. Recorded disciplines include 10K, half marathon, Marathon. The listed surface is road. The listed organiser is Izu Oshima Marathon Organising Committee. The next listed date is Saturday, 5 December 2026. Check the organiser's information for entry and race-day arrangements.

Dates, starts & entry

Times are local to the race. Select the entry route for your distance.

Half · 21.1 km / 13.1 mi
Sat, 5 Dec 2026
Starts 08:20 GMT+9
Entries closed
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Izu Oshima Marathon · Half · 21.1 km / 13.1 mi
2026-12-05 · 08:20 (Asia/Tokyo)
Venue / race area: Oshima, Tokyo, Japan
Race website
Start reminder only; finish time is not confirmed. Adjust the calendar duration if needed.
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Google and Outlook open a prepared event for you to save. Apple uses your private AthRecs race subscription. Download a one-off file only if you prefer to import it yourself.
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Izu Oshima Marathon · Half · 21.1 km / 13.1 mi
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Native name: 第16回伊豆大島マラソン. Date, distance and start time confirmed on the race's RUNNET (RUNTES) entry page, the official entry platform used by the organiser, checked 2026-11-09. Local time Asia/Tokyo.
Edition source
Marathon · 42.2 km / 26.2 mi
Sat, 5 Dec 2026
Starts 08:00 GMT+9
Entries closed
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Izu Oshima Marathon · Marathon · 42.2 km / 26.2 mi
2026-12-05 · 08:00 (Asia/Tokyo)
Venue / race area: Oshima, Tokyo, Japan
Race website
Start reminder only; finish time is not confirmed. Adjust the calendar duration if needed.
Google Calendar Outlook.com Microsoft 365 Apple Calendar
Google and Outlook open a prepared event for you to save. Apple uses your private AthRecs race subscription. Download a one-off file only if you prefer to import it yourself.
Share
Share this race
Izu Oshima Marathon · Marathon · 42.2 km / 26.2 mi
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Choose where to share, then select who to send it to.
Native name: 第16回伊豆大島マラソン. Date, distance and start time confirmed on the race's RUNNET (RUNTES) entry page, the official entry platform used by the organiser, checked 2026-11-09. Local time Asia/Tokyo.
Edition source
10K · 10 km / 6.2 mi
Sat, 5 Dec 2026
Starts 09:00 GMT+9
Entries closed
Check race website
Add to calendar
Izu Oshima Marathon · 10K · 10 km / 6.2 mi
2026-12-05 · 09:00 (Asia/Tokyo)
Venue / race area: Oshima, Tokyo, Japan
Race website
Start reminder only; finish time is not confirmed. Adjust the calendar duration if needed.
Google Calendar Outlook.com Microsoft 365 Apple Calendar
Google and Outlook open a prepared event for you to save. Apple uses your private AthRecs race subscription. Download a one-off file only if you prefer to import it yourself.
Share
Share this race
Izu Oshima Marathon · 10K · 10 km / 6.2 mi
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Choose where to share, then select who to send it to.
Native name: 第16回伊豆大島マラソン. Date, distance and start time confirmed on the race's RUNNET (RUNTES) entry page, the official entry platform used by the organiser, checked 2026-11-09. Local time Asia/Tokyo.
Edition source

Location & race day

Listed venue / area

Oshima, TokyoJPN

Find this location on a map

Confirm the exact start line, parking and arrival instructions with the organiser. A listed town or postcode may cover a wider area.

About the race

Izu Oshima Marathon is a road running event in Oshima, Tokyo Prefecture. The 2026 edition (2026-12-05) offers Marathon, Half, 10K races, as listed on its RUNNET entry page.

Surface:: Road
Organiser:: Izu Oshima Marathon Organising Committee

Race website

Entry options for

Ways to enter

Compare the listed booking routes. Verified links show when they were checked.

Sat, 5 Dec 2026

Official race entry

Official entry

Closed

Recorded Mon, 9 Nov 2026

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Third-party prices, booking fees, allocations and refund terms can differ. Confirm the final details with the provider before paying.

Race questions

When is the next event?

The next listed date for Izu Oshima Marathon is 5 December 2026.

Where is it held?

Izu Oshima Marathon is listed in Oshima, Tokyo, Japan. Check the event's race-day instructions for the exact start location.

Which distances are listed?

The programme listed for 5 December 2026 includes Half marathon, Marathon, 10K.

What time does it start?

Listed starts for 5 December 2026: Half marathon: 08:20 GMT+9; Marathon: 08:00 GMT+9; 10K: 09:00 GMT+9. Times are local to the race venue. Follow the start or wave assigned to your entry.