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22 marathons found for 5K, Japan. Keep the list broad first, then tighten the filters when a race looks realistic.





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Japan
25OCT
21.1K
Saiko Eco-Marathon
Japan
October 25, 2026 OCT
Japan
01NOV
21.1K
Kamogawa Ecomarathon
Japan
November 1, 2026 NOV
Japan
02NOV
21.1K
Yodogawa Ecomarathon
Japan
November 2, 2026 NOV
Fukuoka, Japan
08NOV
42.2K
Fukuoka Marathon
Fukuoka, Japan
November 8, 2026 BQ Qualifier
Japan
22NOV
21.1K
Kyoto Yawata Ecomarathon
Japan
November 22, 2026 NOV
Japan
23NOV
21.1K
Hirakata Ecomarathon
Japan
November 23, 2026 NOV
Japan
27DEC
21.1K
Ecomarathon of Saïko in December
Japan
December 27, 2026 DEC
Japan
09JAN
21.1K
Kamogawa Ecomarathon of January
Japan
January 9, 2027 JAN
Japan
10JAN
21.1K
Yodogawa January Ecomarathon
Japan
January 10, 2027 JAN
Japan
17JAN
21.1K
Nikotama Ecomarathon
Japan
January 17, 2027 JAN
Japan
14FEB
42.2K
Kitakyushu Marathon
Japan
February 14, 2027 to February 16, 2027 FEB
Japan
21FEB
42.2K
Iwaki Sunshine Marathon
Japan
February 21, 2027 FEB
Japan
19MAR
21.1K
Yodogawa Ecomarathon of March
Japan
March 19, 2027 MAR
Japan
20MAR
21.1K
Kamogawa March Ecomarathon
Japan
March 20, 2027 MAR
Japan
21MAR
21.1K
Ecomarathon of Hirakata in March
Japan
March 21, 2027 MAR
Japan
28MAR
21.1K
Ecomarathon Horikiri
Japan
March 28, 2027 MAR
Japan
11APR
21.1K
April Ecomarathon Nikotama
Japan
April 11, 2027 APR
Japan
18APR
ULTRA
Kasumigaura Marathon
Japan
April 18, 2027 APR
Japan
02MAY
21.1K
Yodogawa May Eco-Marathon
Japan
May 2, 2027 MAY
Japan
04MAY
21.1K
Hirakata May Eco-Marathon
Japan
May 4, 2027 MAY
Japan
05MAY
21.1K
Kyoto Yawata Eco-marathon in May
Japan
May 5, 2027 MAY
Japan
09MAY
21.1K
Kanazawa May Ecomarathon
Japan
May 9, 2027 MAY

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