2027 Kumamoto Castle Marathon - Feb 21

2027 Kumamoto Castle Marathon - Feb 21 Countdown

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Race Information

Race2027 Kumamoto Castle Marathon - Feb 21
CityKumamoto
Date2027-02-21 at 09:00
Field Size~13,000 runners
Time Limit7 hours
Cutoff pace9:57/km
Course speed
Typical pace Speed index 1.04 — median of the last 3 winners' times against the global same-year median. Winner times track elite fields and prize money, so this reads the course as a proxy, not a pure measurement.
TimezoneAsia/Tokyo
Official SiteKumamoto Castle Marathon Organizing Committee (熊本城マラソン実行委員会)

Race Day Weather

Average Temperature6.6°C / 44°F
Humidity79%
Peak Wind15.3 km/h
Rain Chance37%
Typical ConditionsStart-time (9:00 AM) readings across the last five editions ranged from 7.3C to 16.7C. In 2024 it climbed from 9.0C to an afternoon 21.4C, and in 2026 from 11.8C to 18.4C (Kumamoto Local Meteorological Observatory).

What to Prepare: The hard variable here is the afternoon warm-up, not the morning chill. Anyone running 4-6 hours covers the last 10km during the warmest part of the day, so a throwaway layer in the corral plus gloves you can shed gives you room to adjust.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Winds peaking around 15.3 km/h — the typical daily maximum for this date — can affect your pace by 5-15 seconds per kilometer in exposed stretches. Headwinds slow you down exponentially: a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Race-Week Climate

Based on 20 years of race-week weather (2005-2024), MERRA-2 reanalysis

Cooler Typical Warmer
Temperature 2.6°C 6.3°C 11.3°C
Dew point -2.3°C 2.4°C 9.3°C
Wet-day chance: 37% Runnability: 70/100

Recent actuals: 2024 9.4°C / 2025 7.7°C / 2026 12.1°C (morning avg)

Data: NASA POWER (MERRA-2 reanalysis), NASA Langley Research Center

Course Profile

Course TypePoint-to-point road marathon
TerrainRoad
ProfileA flat-to-rolling route from central Kumamoto out through the Kawashiri and Akita districts and back north. The official elevation chart spans roughly 30m top to bottom, with the one real effort saved for the final 1.5km climb into Kumamoto Castle's Ninomaru Plaza.
Boston QualifierYes — Check your BQ time

Course Analysis

The rare Japanese big-city marathon you do not have to win a ballot to run

Most large Japanese city marathons offer overseas runners exactly one route in: the lottery. Kumamoto is an exception. The race sets aside an overseas quota of 300 places allocated first-come, first-served with no ballot, open to residents outside Japan and valid for the full marathon only. While domestic applicants face roughly 1.6 applications per place, an international runner who enters early has a place that is largely within their own control.

Three mechanics matter. Entry for this quota must go through Run Japan — the official entry page states that entry via Run Japan is required, and the domestic RUNNET channel does not serve it. The cost sits in a different band from the domestic fee: 20,000 yen entry plus a Run Japan processing fee of 14 percent (2,800 yen), for 22,800 yen total, against 13,750 yen plus 825 yen domestically. And unlike ballot entrants, who pay only after winning a place, first-come entrants must pay as soon as the entry is complete. Opening and closing times are governed by Japan time, the quota closes the moment 300 places are gone, and group entry is not permitted on this route.

One practical warning about the official website: the English, Traditional Chinese, Simplified Chinese and Korean buttons are a Google Translate proxy, not human-written pages — the site's front-end script rewrites them to translate.goog addresses, and the human-written pages that once existed now return 404. Treat the Japanese pages as authoritative for fees, deadlines and terms.

The race itself is substantial: the 2027 edition is the 14th, held Sunday, February 21, 2027 with a 9:00 AM start, capped at 13,000 runners with a 7-hour limit on a JAAF-certified course. In 2026, 13,042 runners started and 12,100 finished, a 92.78 percent finish rate. The finish line sits inside the grounds of Kumamoto Castle, a designated Special Historic Site.

First half: the opening cutoff is generous, the stretch right after it is the tightest on the course

The race starts near Kumamoto City Hall and Taiko Bridge, runs out along Sangyo Road, then Hakusan-dori and Heisei-dori. 5km falls at the Kumamoto Distribution Information Centre and 10km crosses the Shirakawa river on the Kumamoto Nishi-ohashi bridge. Around 15km the course reaches the old castle-town district of Kawashiri, passing JR Kawashiri Station, the Kuramae-dori merchant street and Kawashiri Shrine, before Honda Bridge just short of 20km.

Read the cutoff table carefully, because its shape is counterintuitive. Cutoff 1 sits at 6.1km and closes at 10:15 — 75 minutes, or 12:18 per km. That is very forgiving. But cutoff 2 is at 14.5km and closes at 11:18, which leaves 63 minutes to cover the 8.4km between them: 7:30 per km. That is the tightest segment of all eight cutoffs, and it comes early.

The consequence is worth planning around. If you start from a rear block, get caught in congestion and clear the first cutoff with little to spare, you then have to run 8.4km at 7:30/km to survive the second. The biggest cutoff risk on this course is not the late hill — it is running the opening kilometres too slowly. Once the field spreads out around 5km, get onto a rhythm quicker than 9:00/km regardless of your goal. Work out your own gate-by-gate splits with the pace calculator before race morning.

Second half: flat through Kawashiri and Akita, then up into the castle

The 25km mark passes the Aqua Dome and Akita-higashi Elementary School, and the course reaches 30km via the Kumamoto Port road. From JR Nishi-Kumamoto Station it heads north up Heisei-dori through 35km, hits 40km at Taihei Bridge and the Kumamoto Central Post Office, then slips past the Libwork Fujisakidai Baseball Stadium and the Kumamoto City Museum into Ninomaru Plaza.

From cutoff 2 onward the required pace holds almost perfectly flat at about 9:30 per km — cutoff 3 at 21.0km closes 12:21, cutoff 5 at 29.8km closes 13:45, cutoff 7 at 37.9km closes 15:00. Then cutoff 8 at 40.6km closes 15:30 and the finish closes at 16:00: 30 minutes for the final 1.595km, an allowance of 18:49 per km. That slack exists for one reason.

The organisers' own aid-station map for the 2026 edition calls this final ramp "the biggest challenge of all, a hill right before the finish", and deliberately places the last food station just before it. Reading the official elevation chart, the finish is the highest point on the course, with roughly 20m of climbing packed into the last 1.5km. No official cumulative elevation-gain figure has ever been published, so treat any precise metre count you see elsewhere with suspicion.

On-course fuelling is unusually local. The 2026 map lists 14 water stations plus special hospitality booths serving brown-sugar doughnut sticks, Aso Jersey milk doughnut sticks, rice balls made with Kumamoto-grown rice, aubergine miso soup and Kumamoto tofu. At 26.7km, students from Kumamoto Agricultural High School hand out 5,000 servings of Lakkis lactic-acid drink and 4,500 slices of chiffon cake. The 2027 map is normally published in early February.

Strategy: the 6:40 entry standard and the cutoffs are saying the same thing

The entry requirement is not just the 7-hour limit. Applicants must confirm they can finish within 6 hours 40 minutes (and be born on or before April 1, 2008; high-school students are excluded). Six-forty over 42.195km is 9:29 per km — effectively identical to the roughly 9:30/km that every cutoff from the second onward demands. The apparent hour of slack in the 7-hour limit is almost entirely allocated to the final 1.6km and the castle climb, not spread across the course.

Here is the full official table, with the average pace each gate implies from the gun: 6.1km by 10:15 (12:18/km), 14.5km by 11:18 (9:31/km), 21.0km by 12:21 (9:34/km), 24.8km by 12:55 (9:29/km), 29.8km by 13:45 (9:34/km), 33.3km by 14:18 (9:33/km), 37.9km by 15:00 (9:30/km), 40.6km by 15:30 (9:36/km), finish by 16:00 (9:57/km). The organisers note that the schedule is provisional and timed from the start gun.

Weather is the other planning variable, and the risk runs warm rather than cold. In 2020 the 9:00 reading was 16.7C at 98 percent humidity with 22.5mm of rain falling between 09:00 and 16:00 (Kumamoto Local Meteorological Observatory); that edition finished at 83.30 percent, the lowest across the seven editions from 2018 to 2026. In the other direction, 2024 rose from 9.0C at the start to 21.4C in the afternoon and 2026 from 11.8C to 18.4C. A 4-6 hour finisher runs the closing 10km in the warmest hours of the day, so plan layers you can discard rather than dressing for the start line.

Finally, build the logistics into your flights before you book. Number collection runs only on Friday February 19 (12:00-20:00) and Saturday February 20 (10:00-20:00) at Hanabata Square in the city centre. There is no race-day collection, and a facial-recognition check means nobody can collect on your behalf.

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Frequently Asked Questions

How can a runner based outside Japan enter?

Through the overseas quota: 300 places, first-come, first-served, no ballot. It applies to the full marathon only, is open to residents outside Japan, and closes the moment the 300 places are taken. Entry must be made through Run Japan — the official entry page states that entry via Run Japan is required, and group entry is not available on this route.

The cost is 20,000 yen plus a Run Japan processing fee of 14 percent (2,800 yen), so 22,800 yen in total. Note one difference from the ballot: first-come entrants pay immediately once the entry is complete, rather than after a draw. The window runs from July 28, 2026 at 10:00 to September 24 at 17:00, judged by Japan time, but the practical deadline is whenever the 300th runner enters.

What are the ballot odds if I enter through the domestic route?

The organisers publish applicant numbers and the field cap, but never an acceptance rate. From those two figures: 2026 drew 20,550 marathon applications against 13,000 places, about 1.58 times oversubscribed, and 2025 drew 19,467 against 13,000, about 1.50 times. Round it to roughly 1.6x.

Two caveats change how you should read that. First, the 13,000 cap already contains the first-come charity places (500) and overseas places (300), which are settled before any draw — so the real acceptance rate for an ordinary applicant is lower than the headline figure suggests, and the organisers have never published it. Second, the 2026 figure of 20,550 includes 5,175 first-timer-quota applicants as a subset rather than in addition, so the two numbers should not be added. Our lottery calculator will estimate your combined odds if you are entering several races.

Is there any way to guarantee a place without the ballot?

Two routes, both first-come. The charity runner quota (500 places) guarantees entry to the full marathon or the Fun Run in exchange for a donation of 60 units (30,000 yen) or more to the Kumamoto support fund; the entry fee is payable separately, and the donation qualifies for Japan's hometown-tax donation deduction. The overseas quota (300 places) is the equivalent route for runners living outside Japan.

A common misconception is worth correcting with the organisers' own words: "the presence or amount of a charity donation does not change the probability of winning the ballot." Adding a small donation to a standard entry buys you nothing in the draw — only the 30,000-yen special quota bypasses it. Donors can direct their money to castle reconstruction, sports promotion or community volunteer work, though the organisers note the castle donation carries none of the separate Fukko Joshu programme's benefits.

What are the cutoffs, and is the course beginner-friendly?

The limit is 7 hours, which is relaxed by Japanese big-city standards, but the entry standard asks you to confirm you can finish in 6 hours 40 minutes — that is 9:29 per km, and it matches what the cutoffs actually demand from 14.5km onward.

The trap is early. Cutoff 1 at 6.1km allows 12:18/km, but the 8.4km from there to cutoff 2 at 14.5km allows only 63 minutes — 7:30 per km, the tightest stretch on the course. A first-timer who walks through congestion in the opening kilometres can be running for their race by 10km. Beyond that, the eight gates hold a steady 9:30/km until the finish, where the last 1.595km gets a generous 30 minutes to absorb the climb into the castle.

How steep is the finish, really?

Steep enough that the organisers flag it themselves. Their aid-station map describes the final ramp as "the biggest challenge of all, a hill right before the finish" and positions the last food station immediately before it. On the official elevation chart the finish line is the high point of the whole course, with about 20m of climb in the closing 1.5km, after a route whose total range is only around 30m.

Two notes on precision. The organisers have never published a cumulative elevation-gain number for this course, so specific figures circulating online are not official. And the cutoff structure quietly confirms the difficulty: every gate from 14.5km to 40.6km demands about 9:30/km, then the final 1.595km is given 30 minutes — roughly 18:49/km. That is the course telling you where the hard part is.

What state is Kumamoto Castle in now?

Partly restored, and that is what makes the finish worth seeing. The castle was badly damaged in the 2016 Kumamoto earthquake. Restoration of the main keep was completed in 2021, and since April 26 that year visitors have been able to see fully renewed exhibits and the view from the top floor. The Nagabei wall was also finished in 2021 and the Kenmotsu turret in 2023.

The rest of the site is still a working reconstruction project. As of the castle's official December 2025 status page, the Uto, Hira, Inui, Bagu and Iidamaru turrets, the south and west main gates, and the Honmaru Goten great hall remain under repair, among others. The elevated "special viewing walkway" built in 2019-2020 to let visitors see the work up close is described by the castle authorities as a temporary structure that will be removed once restoration is complete — so the castle you run into now is a version that will not exist later. The 2027 race marks ten years since the earthquake, and the organisers have appointed Suguru Osako as special supporter for that anniversary, while noting that he is not scheduled to run.

What is the weather usually like, and does it affect finish rates?

Late February in Kumamoto is usually cool and dry, but the range at the 9:00 start across the last five editions was wide: 7.3C, 9.0C, 11.8C, 14.1C and 16.7C. The pattern that catches people out is the afternoon: 2024 climbed from 9.0C to 21.4C and 2026 from 11.8C to 18.4C, meaning slower finishers cover their final 10km in the day's warmest hours.

Finish rates have been consistent: 94.10 percent in 2018, 93.51 in 2019, 93.09 in 2023, 90.18 in 2024, 93.44 in 2025 and 92.78 percent in 2026 (13,042 starters, 12,100 finishers). The outlier is 2020 at 83.30 percent, the lowest of the seven editions; the meteorological record for that day shows 16.7C and 98 percent humidity at 9:00, with 22.5mm of rain between 09:00 and 16:00. Pack a throwaway layer for the corral either way, and be ready to shed rather than add.

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