Hasetsune Cup course map and checkpoints

General entry is on RUNNET, first come, first served, and the field is capped at 2,000. For 2026 it opened at 9 PM on June 1, and by the next day the organizer said it was full. Elite and hometown-tax entries still had a few places then. Runners who aren't Japanese use RUNJapan instead, where entry opened at 10 AM on June 10. Priority entry ran May 20 to 29 for runners who'd earned it at the Hasetsune 30K, race volunteers and people with 15 or more finishes.

The 2026 fee was 24,000 yen, or 22,000 yen for registered members of the Japan Trail Running Association or the Tokyo Mountaineering Federation, and 10,000 yen for high school students. It isn't refunded. The hometown-tax entry also needs a donation of at least 30,000 yen to Akiruno or Hinohara. You have to be 16 on race day, carry the IBUKI GPS tracker (renting one costs 2,200 yen), and give your ITRA Performance Index when you enter: start blocks go by it, or by your marathon time if you have no index. The elite category is for past winners and runners with an index of at least 600 for men or 550 for women.

The 2027 dates weren't announced when this page was checked.

Take the train. From Shinjuku, the Chuo Line rapid gets you to Tachikawa in 25 to 30 minutes, about 40 to 50 from Tokyo Station, and the Itsukaichi Line takes about 40 more to Musashi-Itsukaichi. The school is a 15 minute walk from the station.

The race's own lot in Kowada, a 20 minute walk from the venue, held about 180 cars at 3,000 yen, booked ahead, and sold out in 2026. Cars parked illegally around the venue get towed.

Once you're done, the Seoto no Yu hot spring kept its outdoor baths open to runners from 11 PM to 6 AM for 1,000 yen in 2026, with a free night bus from the venue.

The race is self-supported. Taking food or drink from anyone, or any other help, gets you disqualified. At the Tsukiyomi Second Parking Lot, 42.1 km in, you can take up to three 500 ml bottles of water or sports drink. The only other water is natural water above Ayahiro Falls and at Mitake Shrine, both late in the race. The spring past Odake Shrine was dry in 2026.

Friends can watch at Daigomaru (a bus from Takao Station to Jinba Kogen-shita and about 30 minutes on foot), Sengen Pass (about an hour's walk from the Kamikawanori bus stop), Sayaguchi Pass (30 minutes from the Tomin no Mori parking lot) and Mitake, 20 minutes from the cable car. Everyone else can follow your IBUKI tracker online. The finish is in a residential area: no loud cheering, clapping or noisemakers between 10 PM and 7 AM.

In Ōme, the nearest weather station that records temperature, October averages highs of 21.2°C and lows of 12.4°C, with 208.6 mm of rain over about 11 wet days (JMA, 1991 to 2020). The ridges are far higher, and before the 2026 race the organizer warned about the big gap between day and night. In 2026 the sun set at 5:14 PM on race day and rose at 5:45 AM.

The only mandatory item is the IBUKI tracker. The organizer recommends at least 2 liters of water, rain gear that works as a warm layer, food, a light, and a spare light and batteries. Poles have to stay on your pack until Sengen Pass, the first checkpoint. Earphones and headphones are banned, bone conduction included.