Running races in Japan in Oct 2027

12 races in date order

Yamagata Marugoto Marathon
October 2027 · Yamagata · Half · 5km · 3km

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Hirosaki Apple Marathon
October 2027 · Hirosaki, Aomori · Marathon · 10km
Passes Mt. Iwaki and orchards in Japan's top apple region

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Sapporo Marathon
October 2027 · Sapporo, Hokkaido · Half Marathon · 10K · 5K

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Iwate Morioka City Marathon
October 2027 · Morioka, Iwate · Marathon · Fun Run

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OSJ Koumi 100
October 2027 · Koumi, Nagano · 100 Mile

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Hasetsune Cup
October 2027 · Akiruno, Tokyo · 71.5km
The overnight trail race that launched Japan's ultra scene

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Niigata City Marathon
October 2027 · Niigata · Marathon · Fun Run

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Madarao Forest Trails 50km
October 2027 · Iiyama, Nagano · 50km
Through the forest trails of Mt. Madarao

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Shimanto River Ultramarathon
October 2027 · Shimanto, Kochi · 100km · 60km
Along Japan's last clear stream, the Shimanto

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Hiroshima Mikan Marathon
October 2027 · Etajima, Hiroshima · Half Marathon · 10km · 5km

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Tokyo Legacy Half Marathon
October 2027 · Tokyo · Half Marathon
Uses the Tokyo Paralympic marathon course

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Futako Tama Ecomarathon
October 2027 · Tokyo · Half · 10km · 5K
Loops past ponds and parkland by the Tama River

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← Japan Oct Nov Dec Jan 2027 Feb 2027 Mar 2027 Apr 2027 May 2027 Jun 2027 Jul 2027 Aug 2027 Sep 2027

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Every race here is published by its organiser; RunCalendar checks the date and the entry window against the organiser's own page and rebuilds this calendar every night. A confirmed date shows its day; a provisional one shows only its month. Last updated 22 October 2026.