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)
RegistrationRegister · 8000 JPY

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Race Day Weather

Average Temperature3.8°C / 39°F
Humidity76%
Wind18.9 km/h
Rain Chance18%
Typical ConditionsCold, dry and usually sunny late-January weather on the Ibaraki coastal plain, typically 2-8C around the 10:30 AM start, with a brisk sea breeze that can sharpen the chill.

What to Prepare: Dress for a cold but dry race day: arm sleeves and gloves you can shed, a throwaway top layer for the long wait before the 10:30 start, and lip balm or a buff against the dry coastal wind.

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 18.9 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 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
Elevation Gain70m
TerrainRoad
ProfileA flat-based, record-friendly course with only gentle undulations for most of the way; the sting comes after 35 km, where three back-to-back rises test tired legs. Maximum elevation differential is only about 20 m.
Boston QualifierYes — Check your BQ time

Course Analysis

Japan's Canonical Midwinter PB Race

The 74th Katsuta Zenkoku Marathon (projected for the last Sunday of January, Sunday Jan 31, 2027, pending the organizer's official outline) 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 only ~20m of differential, 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, ~8,000 yen), and the entrants skew so serious that even a sub-4 finish does not crack the top half. That density forms natural pace packs that pull you along. 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 lose real minutes crossing the mat (an F-block report took five to six minutes), 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 here is legendary, rumored to outnumber the official stations: locals hand out dried sweet potato, amazake, kintsuba and bananas roughly every couple of kilometers. 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. Each climb is small, only around 10m, but they land on empty legs on a narrow, thinly-spectated rural road. The measured cost is roughly ten seconds per kilometer for runners already fading.

Execute an Even Split, Survive the Late Rises

Katsuta rewards conservatism and punishes early greed. The cleanest results come from holding an even target pace across the flat front to 30km, then refusing to fade, the best 2026 report ran the planned closing kilometers faster than scheduled and accelerated the final two for a true negative split with easy breathing to the line. 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 2027 official date is not confirmed yet, but Katsuta is traditionally held on the last Sunday of January, which points to Sunday, January 31, 2027. The marathon has started at 10:30 AM in recent years (the 10K waves go off later). The course runs through Hitachinaka City and neighbouring Tokai Village in Ibaraki Prefecture, north-east of Tokyo. Use our race time predictor to set a goal once the date is locked in.

How do I enter, and is there a lottery?

There is no lottery. General entry is first-come, first-served (先着順), and the full-marathon field of 12,000 can sell out well before the deadline, so sign up the moment registration opens. Entry runs from around September through the official site and RUNNET, and the full-marathon fee was 8,000 yen for the latest edition. Local residents of Hitachinaka and Tokai get a priority pre-entry window.

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 three short climbs after 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?

Late January in coastal Ibaraki is cold but typically dry and sunny — race day has reportedly avoided rain for many years. Expect roughly 2-8C at the 10:30 start, and a brisk breeze off the nearby Pacific that can make it feel colder. It is fast racing weather; the main challenge is staying warm during the long wait before the gun.

How do I get to Hitachinaka for the race?

Hitachinaka is in Ibaraki Prefecture, north-east of Tokyo, reachable in roughly two hours by JR Joban Line limited express (Katsuta Station) or by highway bus. Most visiting runners stay in Mito or Hitachinaka the night before. Many nationalities can enter Japan visa-free for short tourist stays, and no ESTA or eTA is currently required — confirm your own nationality's rule before booking.

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