2027 Kumamoto Castle Marathon - Feb 21 Countdown

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Registration opens 2026-07 View official registration →

Race Information

Race	2027 Kumamoto Castle Marathon - Feb 21
City	Kumamoto
Date	2027-02-21 at 09:00
Field Size	~13,000 runners
Time Limit	7 hours
Cutoff pace	9:57/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.
Timezone	Asia/Tokyo
Official Site	Kumamoto Castle Marathon Organizing Committee (熊本城マラソン実行委員会)

Race Day Weather

Average Temperature	6.6°C / 44°F
Humidity	79%
Wind	15.3 km/h
Rain Chance	37%
Typical Conditions	Cool, dry late-February weather in inland Kyushu, typically 6-12C at the 9:00 AM start with low rain chance and light wind, ideal for marathon pace.

What to Prepare: Dress for a brisk start that warms through the morning: arm sleeves and a throwaway top layer in the corral, with gloves you can shed once you are moving through the city.

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

Wind at 15.3 km/h can affect your marathon pace by 5-15 seconds per kilometer. 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 Type	Point-to-point road marathon
Elevation Gain	90m
Terrain	Road
Profile	A flat-to-rolling city and riverside course through central Kumamoto and its western districts, saving its one hard effort for the late steep climb up to Kumamoto Castle.
Boston Qualifier	Yes — Check your BQ time

Prepare for 2027 Kumamoto Castle Marathon - Feb 21

Use our free training tools to get race-ready:

Running Pace Calculator — Min/km, Finish Time & Pace Chart

Free running pace calculator for 5K, 10K, half marathon, and marathon. Get min/km or min/mile, your ...

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Free Pace Band Generator — Printable Race Day Wristband

Free printable pace band for marathon, half marathon, or custom distance. Choose even, negative, or ...

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Marathon Wake-Up Time Calculator — Race Morning Timeline

7 AM race, wake at 3:45 AM? Enter the gun time; we work backward through meal, gear, bathroom, warm-...

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Marathon Predictor — 5K, 10K & Half Marathon Race Predictor

Free marathon predictor — convert your 5K, 10K, or half marathon time into race-day estimates from R...

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Race Finish Time Calculator & Predictor — Free

Predict your race finish time from pace, or set a goal time to find required pace. Free instant calc...

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Heart Rate Zone Calculator — 5-Zone Training Guide

What heart rate should you train at? Enter your age and resting HR to get personalized 5-zone traini...

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Frequently Asked Questions

When and where is the Kumamoto Castle Marathon 2027?

The Kumamoto Castle Marathon 2027 is the 14th edition, held on Sunday, February 21, 2027, with a 9:00 AM start. It is a point-to-point course through central Kumamoto City in Kyushu that finishes inside the Kumamoto Castle grounds at Ninomaru Plaza, a special historic site.

How do I enter, and is there a lottery?

Yes, entry is by lottery. The History Tour full marathon caps the field at 13,000 runners, and demand routinely exceeds it, so places are decided by ballot rather than first-come (the most recent edition drew over 20,000 applications). Registration runs through the official site and RUNNET, typically opening in summer the year before, with a standard full-marathon entry fee of 13,750 yen plus a payment processing fee.

What is the time limit and is the course beginner-friendly?

The time limit is a generous 7 hours, one of the more relaxed cutoffs among major Japanese city marathons, which makes Kumamoto welcoming for a first marathon. The course is mostly flat with rolling sections, but it ends with a genuinely steep climb up to the castle, so save some energy for the finish and plan your effort with our pace calculator.

Is the Kumamoto Castle Marathon a Boston-qualifying race?

Yes. The course is certified by the Japan Association of Athletics Federations (JAAF / 日本陸連公認), so an official chip time can be used for Boston Marathon qualifying if you meet your age-group standard. The late castle climb costs a little time, so build that into your goal.

What makes the finish at Kumamoto Castle special?

The race finishes with a famously steep ramp up into the Kumamoto Castle grounds, met by some of the loudest roadside support in Japan. The castle was badly damaged in the 2016 Kumamoto earthquake and has become a symbol of the region's recovery, so crossing the line beneath it carries real meaning for runners and the city alike.

Do I need a visa or travel authorization to run as a foreign visitor?

Many nationalities (US, UK, EU, Australia and others) can enter Japan visa-free for short tourist stays; confirm your own nationality's requirement before booking. Japan does not currently require an ESTA or eTA. Kumamoto is reachable by Kyushu Shinkansen and by air via Kumamoto Airport, making a race-weekend trip from major hubs straightforward.

What is the weather usually like in late February?

Late February in inland Kumamoto is cool and usually dry, often 6-12C at the start with light wind and a low chance of rain. These are close to ideal marathon conditions, but pack a throwaway layer for the corral and be ready for a chilly wait before the gun.