2027 Katsuta Marathon - Jan 31

2027 Katsuta Marathon - Jan 31 Countdown

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Race Information

Race2027 Katsuta Marathon - Jan 31
CityHitachinaka
Date2027-01-31 at 10:30
Field Size~12,000 runners
Time Limit6 hours
Cutoff pace8:32/km
TimezoneAsia/Tokyo
Official SiteKatsuta Zenkoku Marathon Organizing Committee (勝田全国マラソン実行委員会)

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Race Day Weather

Average Temperature3.8°C / 39°F
Humidity76%
Peak Wind18.9 km/h
Rain Chance18%
Typical ConditionsLate-January racing calls for cold-weather preparation. Check the race-week forecast for temperature, wind and rain.

What to Prepare: Prepare a removable warm layer for the wait before the 10:30 start, plus gloves. Adjust your racing kit to the forecast instead of assuming a dry day.

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

The historical daily peak wind shown here is context, not a race-day forecast. Use your running pace, wind direction and exposure in the wind calculator instead of assuming a fixed seconds-per-kilometer penalty.

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 1.1°C 3.4°C 7.1°C
Dew point -3.6°C -0.6°C 4.3°C
Wet-day chance: 18% Runnability: 67/100

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

Course Profile

Course TypeLoop-style road marathon through Hitachinaka and Tokai
TerrainRoad
ProfileThe official elevation chart shows a largely gentle course with short rises around 32–35 km. Keep some reserve for those late undulations.
Boston QualifierYes — Check your BQ time

Course Analysis

Japan's Canonical Midwinter PB Race

The 74th Katsuta Zenkoku Marathon (confirmed for Sunday Jan 31, 2027 at 10:30 AM JST) is the unglamorous race serious Japanese amateurs pick precisely because it has nothing to prove. Founded in 1953, it is one of the country's oldest mass marathons, and its honmei (true-target) reputation is structurally earned: a JAAF-certified loop through Hitachinaka City and Tokai-mura with gentle undulations, run in the cold, dry, often-sunny window of late-January Ibaraki.

What makes it fast is the field as much as the flat. The full marathon caps at 12,000 on a first-come basis (no lottery, 9,000 yen for 2027), and the field can be crowded. Use the pace calculator to set a realistic target before you read the course below.

The Flat Front and the 13km Temptation

The full marathon goes off at 10:30, unusually late for a Japanese race, by design: there is no race-day check-in, so a same-morning day-trip from Tokyo works (limited express Ueno to Katsuta in roughly 70 minutes). Be in your assigned block ten minutes early, and run to net time, not gun time. Rear corrals take time to cross the mat, so do not panic-surge through the congested first kilometer chasing a gross-time split.

From there the course is genuinely flat and forgiving, and the first half is where discipline is banked rather than spent. The one trap is a tempting downhill near 13km, paired with a short rise around 14km. Free speed here feels like a gift, but it is a loan the late hills collect with interest. Hold even effort through the flat middle and let the cold-dry coastal air do the work for you.

Hoshiimo Warmth, Then the 32km Sting

The back half is where Katsuta reveals both its soul and its single cruelty. Hitachinaka is Japan's number-one producer of hoshiimo (dried sweet potato), and the private roadside aid appears along the course: locals hand out dried sweet potato, amazake, kintsuba and bananas. The finisher's gift is hoshiimo itself, and runners love the pun, since "dried potato" (kanso-imo) sounds exactly like "finished-the-race potato." For a time goal, run past it rather than graze.

The race is decided in the 32 to 35km zone, a triple consecutive up-and-down that runners call the decisive point, followed by more short rises just past 35km. The rises are short, but they land on empty legs on a narrow, thinly-spectated rural road.

Execute an Even Split, Survive the Late Rises

Katsuta rewards conservatism and punishes early greed. Aim for even effort through the early kilometers and leave room to adjust on the late rises. Build that plan with the negative-split planner: the win condition is to arrive at 32km with reserve, not to attack a hill.

Two practical guards. Dress for the cold start-line wait, not the run, a throwaway layer and gloves over your kit, and tuck behind groups on the exposed coastal stretches where a steady northerly breeze blows; the what-to-wear tool calibrates the layers. And because this is a certified, fast, cold-air course, a Boston-qualifying attempt is well-placed here; verify your BQ standard before race day.

Prepare for 2027 Katsuta Marathon - Jan 31

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Frequently Asked Questions

When is the Katsuta Zenkoku Marathon 2027 and what time does it start?

The 74th Katsuta Zenkoku Marathon takes place on Sunday, January 31, 2027, with the full marathon starting at 10:30 AM JST. The organizer has confirmed both in the official event outline. The course runs through Hitachinaka City and neighbouring Tokai Village in Ibaraki Prefecture.

How do I enter, and is there a lottery?

General full-marathon entry and the hometown-tax quota closed on October 13, 2026, before the advertised general deadline. The overseas Run Japan route is listed separately; check that provider for its current availability.

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

The cutoff is 6 hours (you must finish by 16:30), which is tighter than the 7-hour limits at some big Japanese marathons. Katsuta is best thought of as a runner's race for chasing a time rather than a first-timer's stroll, though steady runners well inside 6 hours are very welcome. Plan your splits with our pace calculator, and save something for the short rises around 32–35 km.

What makes Katsuta worth travelling for?

It is one of Japan's largest mid-winter mass marathons and is famous for extraordinary local hospitality: residents line the route handing out home-made food and hot drinks, giving the course a warm festival atmosphere despite the cold. The flat-based, record-friendly profile and reliably dry January weather also make it a genuine target for a personal best, which is why many Japanese runners treat it as their main goal race of the season.

Is Katsuta a Boston-qualifying race?

Yes. The course is certified by the Japan Association of Athletics Federations (JAAF / 日本陸連公認) from Hitachinaka City to Tokai Village, so an official chip time can be used toward Boston qualifying if you meet your age-group standard. Check where you stand with our Boston qualifying calculator.

What is the weather usually like in late January?

Check the race-week forecast for Hitachinaka rather than assuming a dry race. Prepare a warm layer for the wait before the 10:30 start, and choose clothing for the expected temperature, wind and rain.

How do I get to Hitachinaka for the race?

The organizer describes a roughly 70-minute limited-express journey from Ueno to Katsuta Station. Check the current timetable and allow time to reach your starting block. For international travel, confirm the Japanese Ministry of Foreign Affairs entry requirements for your nationality before booking.

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