Itabashi City Marathon
Tokyo, Japan · Monday 14 June 2027
Itabashi City Marathon, held in Tokyo, Japan, is a popular event that attracts runners from across the region. The course takes participants through the city's vibrant streets, offering a glimpse into Tokyo's urban charm. With its well-organized logistics and enthusiastic community support, this marathon is a must-do for those seeking a unique urban running experience. The event features a mix of flat and rolling hills, making it accessible to runners of all levels.
Difficulty Calculator
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:m
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Adjusted Time
4:04:21
Time difference: +4.3 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain36m
Elevation High11m
Elevation Low3m
Weather Forecast
High27°C
Low18°C
Chance of Rain39%
How hard is Itabashi City Marathon?
Difficultharder than 61% of marathons
Flattest / easiestHardest
On our difficulty model, Itabashi City Marathon plays about 8 minutes slower than an average road marathon for a 3:30 runner. It ranks #453 hardest of 1150 marathons we analyse, and #4 of 15 in Japan. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Itabashi City Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Itabashi City Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:01:37 | +01:37 |
| 3:30:00 | 3:32:57 | +02:57 |
| 4:00:00 | 4:04:21 | +04:21 |
| 4:30:00 | 4:35:48 | +05:48 |
| 5:00:00 | 5:07:18 | +07:18 |
| 5:30:00 | 5:38:51 | +08:51 |
| 6:00:00 | 6:10:27 | +10:27 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Itabashi City Marathon 2027 Course Analysis
Itabashi City Marathon is a full marathon held in Tokyo, Japan. It is scheduled for Monday 14 June 2027. The course is run on road surface with 36m of total climbing, with its high point near 11m above sea level. For registration and full race details, visit the official Itabashi City Marathon website.
Elevation Profile
This is a very flat course, with only 36m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.
Expected Race Day Weather
Based on historical weather data for June, the expected race day conditions are as follows. Hot conditions are expected, with temperatures between 18°C and 27°C. Heat is one of the biggest performance factors in distance running - for every degree above 15°C, finish times can slow by roughly 1-2%. Extra hydration and a conservative start are strongly recommended. There is a moderate chance of rain (39%). Runners may want to prepare for wet conditions but shouldn't expect persistent rainfall.
Surface Type: Road
Itabashi City Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Itabashi City Marathon against other marathons to find the right race for your goals.
Marathons of similar difficulty
If Itabashi City Marathon fits your goal, these courses play out about the same on our difficulty model.