Best Marathons in Japan 2026-2027

The Tokyo Marathon is the largest with a field of around 38,000 runners, and it is Japan's only World Marathon Major. Osaka (about 32,000) and Naha (around 30,000) are the next biggest, followed by Yokohama at roughly 25,000. If you want the electric big-city crowd support Japanese marathons are famous for, those four deliver it; smaller regional races like Nagano (10,000) and Ibusuki Nanohana (10,000) trade scale for a more intimate, scenic atmosphere.

All fourteen races here are Boston-qualifying eligible on certified courses, but the flattest and fastest are Osaka (21 m of elevation gain), Beppu-Oita (30 m), and Fukuoka (35 m), all run in cool 6-9°C winter weather that helps your splits. Beppu-Oita is the serious one: it is an AIMS-certified race whose Category 4 entry itself requires a sub-3:30 marathon, so the field is fast and the pacing honest. Plug your target into our Pace Calculator, then confirm the standard with our Boston qualifying tool. For a flatter big-field PB without an entry standard, Osaka is the pick.

Most large Japanese marathons use a lottery. Tokyo is the hardest: roughly 300,000 people apply for under 40,000 places, an acceptance rate near 10%, with the entry fee due within about two weeks of winning. Missed the ballot? Tokyo's Run with Heart charity program offers about 5,000 places, with charity donations starting from about 100,000 yen (the exact minimum varies by partner charity). Osaka and Kyoto also ballot. Smaller races like Ibusuki Nanohana and Nagano are typically first-come, first-served, so a confirmed bib is far easier to secure.

Ibusuki Nanohana (January, Kagoshima) has the most generous cutoff on this list at 8 hours, the longest of any marathon in Japan, winding past rapeseed fields, Lake Ikeda and Mt. Kaimon, which makes it a favourite first marathon. Most other Japanese races give you 7 hours, including Tokyo, Osaka and Kobe. Be cautious with Beppu-Oita (3.5-hour limit, elite field) and Naha, whose 180 m of climbing and December Okinawan warmth make a 6h15m cutoff feel tight. Estimate your finish against the cutoff with our Finish Time Calculator.

Late winter and early spring are prime: Osaka (late February), Kyoto (February) and Tokyo (March) average a cool 6-8°C, ideal for fast times. Autumn races such as Kanazawa and Kobe (October-November) run a bit warmer at 13-14°C. Two outliers break the pattern: Hokkaido is an August summer marathon averaging 22°C in Sapporo, and Naha in December stays around 21°C in subtropical Okinawa. Check conditions for your target date with our Weather Score tool.

Yes. The Nagoya Women's Marathon (March, around 20,000 runners) is recognised by Guinness World Records as the world's largest women-only marathon. It is famous for a luxury-brand finisher gift: recent editions hand every finisher an exclusive Baccarat crystal tumbler along with a New Balance finisher tee (earlier years awarded a Tiffany & Co. pendant). The course is flat (40 m of climb) and BQ-eligible, making it both a celebrated experience and a legitimate PB opportunity.

No. The big international races like Tokyo, Osaka and Kyoto provide English signage, English-language registration and multilingual volunteers, and many offer dedicated overseas entry channels. Japan's main entry portals are RUNNET and TATTA; for races where overseas runners cannot use the official app (such as Hokkaido), you apply through RUNNET or an official travel-agency package. Smaller regional marathons may have less English support on-site, but course markings and the famously precise logistics make them straightforward to run.