Tokyo
Half Marathon
Koto Seaside Marathon
江東シーサイドマラソン大会
Date
November 29, 2026
Location
Tokyo
Distance
Half Marathon
Entry Fee
¥8,500
Time Limit
—
Capacity
4,000 runners
Finish Rate
—
Last updatedJuly 13, 2026·45 days agoOfficial site checkedAugust 17, 2026Info may be outdated
AI summary
COURSECourse certification
JAAF certifiedCourse Certified by the Japan Association of Athletics Federations (Public Interest Incorporated Foundation)
Cutoffs & time limit
Half Marathon: 5 km checkpoint at 38 minutes (9:53), 15 km checkpoint at 105 minutes (11:00), 20 km checkpoint at 140 minutes (11:35), finish cut-off at 150 minutes (11:45)
Start method
Start Times: Half Marathon at 9:15 a.m., 10K at 9:45 a.m.
Finisher rewards
Participation Prize: Commemorative race T-shirt. Finishers will receive a certificate of completion (both paper and online). Top finishers will receive a certificate and a medal (Koto Ward Mayor’s Award).
Changing & baggage
Luggage storage available (valuables not accepted)
Summary for guidance. Always confirm details on the official site. Last verified: June 22, 2026
Access
ACCESSNote: the map shows the approximate area. Check the official site for the exact start/venue.
Find a place to stay
STAYOpens an external booking site with check-in set to the day before the race.
Links to external booking sites (affiliate programs may be used). Reservations and payments are handled on each site.
Score
RATINGSAuto-calculated from market research, official data, and online voicesSome scores unavailable（4/6）Course Appeal
コースの魅力
N/A
Organization & Support
運営・サポート
N/A
Finishability
完走しやすさ
N/A
Atmosphere
大会の盛り上がり
N/A
Access
アクセス
3.0
Value for Money
コスパ
2.5
Runner Reviews
REVIEWSNo runner reviews for this race yet.
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