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10th Oi Tokyo Summer Marathon (第10回大井東京夏マラソン)

Japan flag
Shinagawa Ward, Tokyo, Japan

calendar_today 20 Sep, 2026

directions_run Running

language Official Website

sell $15.80 – $44.24

10th Oi Tokyo Summer Marathon (第10回大井東京夏マラソン)

About the Event

Tokyo's Oi Athletics Stadium and its surrounding pathways come alive with the energy of runners as they prepare for the Tokyo Marathon through this full marathon training race. The course offers participants an opportunity to acclimate themselves to the terrain and conditions that will be encountered during the main event.
The entry fees are structured to accommodate various distances: 7,000 yen for the full marathon, 3,000 yen per person for relay teams with a team registration fee of 2,000 yen. For those aiming at shorter races, there's also a half marathon priced at 6,000 yen and a 10km race costing 4,500 yen (with a pair rate of 5,500 yen). The 3km run is set at 3,500 yen for individuals or pairs at 4,500 yen. For the youngest participants, there's even a fun 1.5km race priced at 2,500 yen (with pair rates of 3,500 yen and family options starting from 3,500 yen).
The event is designed to provide runners with an immersive experience in one of Tokyo’s premier athletic venues, offering scenic routes around the stadium that cater to all levels of fitness. Whether you are a seasoned marathoner or just beginning your journey, this race offers a perfect blend of challenge and support.
Registration fees include access to water stations along the route as well as medical assistance if needed during the event. The atmosphere is vibrant with local supporters cheering runners on throughout their course.
Participants can enjoy the camaraderie among fellow athletes while preparing for one of Japan's most anticipated running events, the Tokyo Marathon. This training race not only serves to hone your skills but also allows you to familiarize yourself with the surroundings and conditions that will be present during the main event in February.
The Oi Athletics Stadium is known for its well-maintained facilities and welcoming environment, making it an ideal location for runners of all abilities looking to sharpen their marathon training. With distances ranging from 1.5km up to a full marathon, there's something here that will suit every runner’s goals.
This event promises not only physical preparation but also mental readiness through the community spirit and support found at Oi Athletics Stadium during this preparatory race for the Tokyo Marathon.

Races Offered

1.5km

Sep 20, 2026

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Distance — 1.5K

terrain

Type — Running

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38 days remaining

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$15.80

10km

Sep 20, 2026

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Distance — 10K

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Type — Running

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38 days remaining

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$28.44

30km

Sep 20, 2026

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Distance — 30K

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Type — Running

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38 days remaining

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$41.08

3km

Sep 20, 2026

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Distance — 3K

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Type — Running

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38 days remaining

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$22.12

Full Distance Relay

Sep 20, 2026

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Distance — Full Distance Relay

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Type — Running

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38 days remaining

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$44.24

Full Marathon

Sep 20, 2026

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Distance — 42.2K

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Type — Running

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38 days remaining

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$44.24

Half Marathon

Sep 20, 2026

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Distance — 21.1K

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Type — Running

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38 days remaining

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$37.92

Half Relay

Sep 20, 2026

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Distance — 21.1K

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Type — Running

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38 days remaining

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$37.92

Weather History

These values represent the 3-year monthly averages for September in Shinagawa Ward.

thermostat Temperature
23.3° / 29.5°
wb_sunny Feels like
25.0° / 31.5°
light_mode Avg sunshine hours
8h 49m
water_drop Avg rainfall
6.4 mm
ac_unit Avg snowfall
air Avg wind speed
14.9 km/h (Gentle breeze)
opacity Sweat loss rate
Very high
terrain Course conditions
Hard and dry surface
sunny Max UV Index
Moderate (5.0)
humidity_mid Humidity
78.9%
wb_twilight Sunrise
05:23
nightlight Sunset
17:47

Hotels & Places to Stay

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