富士山マラソン
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Dec 13, 2026
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The Mt. Fuji International Marathon, known in Japanese as Fujisan Marathon, is a road marathon around Lake Kawaguchi and Lake Saiko in Fujikawaguchiko, Yamanashi, held in December. The 42.195 km course is certified by the Japan Association of Athletics Federations and starts and finishes at the Funatsuhama parking lot on the shore of Lake Kawaguchi, with the start at 9:00 am. The time limit is six hours from the gun, with six checkpoints along the course: 12.1 km at the Kawaguchiko Ohashi bridge, 20.5 km, 27.3 km, 30.3 km, 35.1 km and 37.7 km at Michi-no-Eki Katsuyama, and the finish closes at 3:00 pm. Other events include a 17 km lap of Lake Kawaguchi, a 10.5 km charity fun run and, from 2026, a Saturday programme of 4 km and 8 km Fuji View Runs. The race is hosted by Nikkan Sports Holdings, the town of Fujikawaguchiko, the Yamanashi Association of Athletics and the RBS Sports Foundation. It started in 2012 as a development of the Kawaguchiko Nikkan Sports Marathon, which had been held 36 times from 1976. Entry is first-come, first-served, and runners must be at least 18 years old.
Typical climate for the race month — an estimate, not a forecast or a race-day record
December at Lake Kawaguchi is cold: average highs are around 8°C and lows around -3°C, with relative humidity near 66% and rain or snow on about five days of the month. The 9:00 am start is typically close to freezing.
The Race
Kawaguchiko
The Mt. Fuji Marathon was created in 2012 in place of the Kawaguchiko Nikkan Sports Marathon, which had been held 36 times since 1976. The organisers count the 2026 race as the 15th Mt. Fuji International Marathon and the 51st overall including the earlier race.
The first race, on 25 November 2012, drew 23,320 registrations, about 10,000 more than the final Kawaguchiko Nikkan Sports Marathon. Traffic jams around the venue meant that many runners could not reach the start in time; reports say roughly 18,000 ran and up to about 5,000 missed the start. From the second edition the organisers reduced the field and moved the marathon start from 8:15 to 9:00.
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