EVENT DETAILS
Tokyo Yamathon is a fundraising challenge where teams of 2-4 people compete to walk through Tokyo, visiting all 30 stations of the Yamanote train line in under 12 hours.
EVENT
DATE
TEAM
Team Registration Fee
START / FINISH
APPLICATION PERIOD
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Saturday, October 04, 2025
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START: 8:00 - 9:45 (Block start every 15 minutes to prevent crowding)
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FINISH:
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Full Yamathon Finish: 21:30
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Half Yamathon Finish: 16:30
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Half-a-Half Yamathon Finish: 14:00
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All teams must finish by their respective finish times.
2 - 4 Members
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14,000yen – 100% of donation will go to our community impact partners *
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Team registration fees are non-refundable, even in the event of cancellation.
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The donation amount is the same for both Full and Half Yamathon.
Full Yamathon:
- Start / finish: Tokyo TOKIA Building (Marunouchi)
Half Yamathon:
- Start: Tokyo TOKIA Building (Marunouchi) Finish: JR Mejiro Station
Half-a-half Yamathon:
- Start: Tokyo TOKIA Building (Marunouchi) Finish: JR Osaki Station (New West Exit)
All entries must be received by : 10 September 2025 ( Wednesday ) 19:00
see below
INFORMATION
ORGANIZER:
IVG -JAPAN
© 2025 International Volunteer Group (General Incorporated Association)
Yamathon ™ and ヤマソン™ are registered trademarks of IVG-Japan
2025
COMMUNITY IMPACT Partners:
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Japan Children's Hospice Association
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NPO Waffle
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Tochigi Conservation Corps
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World Central Kitchen
Premier Sponsors:
Major Sponsors:
Vehicle Partnership
Supporters:
volunteer Partners:
J.P.Morgan
Salesforce Japan
Morgan Stanley Japan Holdings Co., Ltd
Manulife Life Insurance Company
Databricks Inc.
Indeed Japan K.K.
BNP Paribas Securities (Japan) Limited
Capgemini Japan K.K.
CBRE, Group Inc.
Hewlett Packard Enterprise
TMF Group Limited (Japan)
Jaguar Land Rover Japan Limited
HP Inc.
JR East Japan Railway Company
Coca Cola Bottlers Japan Inc.
Shake Shack Japan
DECATHLON Japan
Mitsubishi Property Management
Isohata Osteopathic Clinic
Ryotokuji University
Tokyo Therapeutic Institute
Gunma Kokusai Academy
Kaetsu Ariake Junior and Senior High School
UIA International School of Tokyo
Canadian International School
Shiba Kokusai Jr. & Sr. High School
Global Indian International School Tokyo
GUIDELINES
SAFETY INSTRUCTIONS:
TEAM NUMBER CARDS
TIME RECording / ranking
COURSE NAVIGATION
ELIGIBILITY
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Walk in single file. Do not obstruct other pedestrians.
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Walk on the pavement/sidewalk where present.
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No pavement/sidewalk – walk on the right-hand side, facing on-coming traffic.
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Obey all traffic laws and signals.
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Obey any instructions given by police.
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Do not take shortcuts through private property such as temples, shrines, parks, etc.
Upon entry, the organizer will assign the team number cards for your team.
Your team number cards will be posted to the team leader before the event date.
Timing is managed by WEBSCORER START WAVE and Devices managed at the finish point.
Team time results will be available about 5 mins post finish per team on Webscorer.
*Timekeeping and rankings will be announced, but Tokyo Yamathon is not a marathon.
The goal is to complete the Yamathon challenge, not to focus on timing or ranking.
Teams must navigate around the Yamanote Line.
Shortcuts are allowed as long as you visit all 30 stations.
*Smartphone users: click HERE for our guide map. For more details, see our FAQ.
*Please open in an internet browser (not Google Maps app).
Must be at least 18 years old.
If you are under the age of 18, you must be accompanied by a guardian or adult.
Have the ability to finish Yamathon in 12 hours.