Ultra Running Hub Ishioka, Ibaraki Pref., Japan · Sunday, September 27, 2026
Tsukuba Renjyo 70 Km Road & Trail Run
What the course asks
DUV results for the 2025 edition (72km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, September
Regional 2001-2020 average for September — NASA POWER, grid elevation 33 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 72km | 141 | Takayuki Nishihara · 07:07:33 | Chihiro Miya · 08:45:17 |
| 2024 | 75km | 96 | Hisashi Kitamura · 07:00:46 | Naoe Ookubo · 09:51:56 |
| 2023 | 75km | 97 | Katsuya Ishii · 07:27:22 | Ayaka Jifuku · 10:48:35 |
| 2022 | 75km | 126 | Takaomi Idesawa · 07:51:24 | Kaori Ueki · 10:35:37 |
| 2019 | 70km | 158 | Jumpei Yamaguchi · 06:31:08 | Aya Doi · 09:34:16 |
| 2018 | 70km | 69 | Takayuki Nishihara · 07:31:37 | Kanako Edamoto · 09:33:07 |
| 2017 | 70km | 133 | Hiroki Nakajima · 06:33:41 | Tomomi Nakajima · 08:08:26 |
| 2016 | 70km | 247 | Hiroki Nakajima · 06:45:03 | Kaori Saito · 08:24:11 |
| 2015 | 70km | 342 | Yuuji Horiuchi · 06:37:40 | Kanae Takemura · 08:33:25 |
| 2014 | 70km | 113 | Yuuji Horiuchi · 06:21:45 | Haruka Yamanouchi · 08:19:51 |
The field grew 47% between 2024 (96) and 2025 (141). 11% of the 2025 field were women.
DUV results for the 2025 edition (72km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Course notes
- terrain This is a rolling course. Expect fast, runnable sections where rhythm is key.
- gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 72 km of trail with 2,580 m of ascent.
- Trail Running Shoes 36 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition 72 km of self-supported fuelling between aid stations.
- Hydration Vests Pole attachment and chest-strap stability on steep ground.
- Trekking Poles 2,580 m of ascent to walk up.
- Headlamps A 13 h limit puts you out there after dark.
Overview
The Tsukuba Renjyo 70 Km Road & Trail Run took place in Ishioka, Ibaraki Pref., Japan, featuring a 72-kilometer course with 2580 meters of elevation gain. That profile yields 35.8 meters of climbing per kilometer across mixed terrain, demanding sustained uphill work on tired legs.
A 13-hour overall time limit sets the required pace at 10.8 minutes per kilometer, making the cut-off tighter than 58% of 50-mile peer races and more generous than 42%. Runners faced a steady clock that left little room for lingering at aid stations along the climbs.
With 141 finishers in the 2025 edition, the event fielded a larger group than 82% of comparable 50-mile races, while remaining smaller than 18%. Having debuted in 2014 across 10 editions, it tested athletes with a balanced mix of road and mountain running.
Similar races
Other 50 mi trail ultras, closest in distance first.