Itabashi City Marathon
Tokyo, Japan · Sunday 14 June 2026
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.\n\nThe event features a mix of flat and rolling hills, making it accessible to runners of all levels. Whether you're a seasoned
Difficulty Calculator
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:m
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Adjusted Time
3:48:39
Time difference: -11.4 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain36m
Elevation High11m
Elevation Low3m
Weather Forecast
High8°C
Low4°C
Chance of Rain100%
Itabashi City Marathon 2026 Course Analysis
Itabashi City Marathon is a full marathon held in Tokyo, Japan, scheduled for Sunday 14 June 2026. The course is run on road surface with 36m of total elevation gain, reaching a maximum altitude of 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 elevation gain across the full distance. The course ranges from 3m to 11m above sea level — a 8m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.
Expected Race Day Weather
Based on historical weather data for June, the expected race day conditions are as follows. Cold conditions are expected, with temperatures between 4°C and 8°C. While cold weather reduces overheating risk, runners should dress in layers and be prepared for potential wind chill. There is a high chance of rain (100%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.
Surface Type: Road
Itabashi City Marathon is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
How Difficult Is Itabashi City Marathon?
Our difficulty rating for Itabashi City Marathon is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
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.