Ogose, Saitama Pref., Japan · Sunday, October 4, 2026

Fixed Distance 50K

Trainic world Ogose-Tokigawa Trail Run 50km

Race completed

51.4 km Distance

1,400 m Climbing

4.7 Grit · Challenging

35.9645° N, 139.2941° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 27 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 11 hours 12:50 min/km average. Comfortable. Room to walk the climbs and stop at aid. More forgiving than 61% of 50K races. Measured against 1058 races of the same distance. Cut-off calculator →

Field size ~227 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (51.4km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, October

Daytime high 20°C

Night low 11°C

Rainfall Wet — expect rain

Daylight 11 h 45 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 264 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	51.4km	227	Jun Arakawa · 05:46:44	Katura Oono · 06:53:37
2024	51.4km	222	Yukihiro Mano · 06:02:55	Chisato Kario · 07:09:17
2023	51.4km	227	Hayato Kimura · 06:06:27	Sayuri Tanaka · 07:34:57
2022	49.6km	174	Wataru Sato · 05:27:53	Azusa Kaneko · 07:37:57
2018	49.6km	307	Mituhiro Saito · 06:03:37	Kumi Shinomiya · 06:59:28
2017	49.6km	305	Masato Chiba · 05:21:20	Kumi Shinomiya · 06:34:03
2016	49.6km	203	Yuichi Hosoyama · 05:35:58	Mayumi Matsuura · 07:16:15
2015	49.6km	343	Yukio Shibata · 05:33:47	Kayo Kishikawa · 06:51:42

The field has held steady: 222 in 2024, 227 in 2025. 11% of the 2025 field were women.

DUV results for the 2025 edition (51.4km) — 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 51 km of trail with 1,400 m of ascent.

Trail Running Shoes 27 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 51 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 1,400 m of ascent to walk up.
GPS Watches Battery life first — a 51 km day outlasts most full-GPS modes.

Salomon

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

New Balance

Fuel Cell Super Comp Trail

★★★★★ 4.5

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

Black Diamond

Distance FLZ

Lightweight folding trekking poles with FlickLock Z adjustment. 340g per pole.

$170 ★★★★★ 4.7

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7

All gear guides →

Overview

The Trainic world Ogose-Tokigawa Trail Run covered 51.4 kilometers through Ogose, Saitama Pref., Japan, drawing a crowd bigger than 92% of 50k fields with 227 finishers in its 2025 edition. Held across 8 editions since 2015, the race balanced its large turnout with a moderate 1400 meters of elevation gain, working out to 27.2 meters of climb per kilometer.

Runners faced an 11-hour time limit, establishing a cutoff pace of 12.8 minutes per kilometer. That schedule was more generous than 60% of 50k cut-offs and tighter than 40%, leaving ample room to manage the route's steady ascents without severe pressure from the clock.

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