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Shimonoseki Kaikyo Marathon
Crosses the Kanmon Strait between Honshu and Kyushu
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Nakanoto Treasure Trailrun
Trail through Noto Peninsula's Satoyama heritage terrain
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Toyama Marathon
Views of the Tateyama mountain range
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Chikugogawa Marathon
Flat cycling-path course beside Kyushu's largest river
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Gunma Marathon
Flat course beside Japan's Tone River
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Okayama Marathon
Flat course finishing near Okayama Castle
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Fukuoka Marathon
Scenic coastal marathon through the vibrant city of Fukuoka
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Ibigawa Marathon
Out-and-back half marathon through Ibigawa's hill villages
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Chiba Aqualine Marathon
The only day you can run across Tokyo Bay
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FunTrails Round Chichibu & Okumusashi
A loop through the Chichibu and Okumusashi mountains
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Kobe Marathon
Urban Japanese marathon with skyline and mountain views
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Nagasaki Bayside Marathon
Bayside course along Nagasaki's harbor waterfront
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Hirakata Ecomarathon
Loops the Yodogawa riverside path, capped at 200 runners
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Ageo City Half Marathon
Where Japan's fastest half marathon times are made
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Fukuchiyama Marathon
Yura River out-and-back finishing with a steep 40m climb
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Tsukuba Marathon
Flat science-city course finishing near Mt. Tsukuba views
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Otawara Marathon
Bowl-shaped course meets the 'Nasu Oroshi' wind past 25km
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Koedo Kawagoe Half Marathon
Runs past Kawagoe's Edo-era Kurazukuri warehouse street
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Yoron Marathon
Loops a subtropical island famed for turquoise sea
Save any of these to your season in RunCalendar and hear the morning entries open. Free on iPhone, no account needed.
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.