Tadahiko (大湯忠彦) Oyu

Born : 1967 Cat. M55 Ultrarunner since 2014

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details

Countries visited ?

Japan

10,8%

Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 1 708; Σ finishers = 15 776. 1 708 / 15 776 × 100 = 10.83%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed13

Km — ultra races1 165 km

Longest race100,0 km

29th Fuji 5 Lakes 100 km Challenge — 21/4/2019

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road100,0%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M1

Longest winning streak0

Current streak0

Records

100 km9h11'08 6 h67,82 km

HISTORY

13 race(s)

Date		Race	Perf.	Rk
2019
02.06	78km	26. Ultramarathon Okumusashi	7:44:18 h	174
21.04	100km	29th Fuji 5 Lakes 100 km Challenge	9:39:30 h	98
2018
24.06	100km	33. Lake Saroma 100 km Ultramarathon	9:22:49 h	240
03.06	78km	25. Ultramarathon Okumusashi	7:54:03 h	131
22.04	100km	28th Fuji 5 Lakes 100 km Challenge	9:53:36 h	119
17.03	6h	8th Iikoto Challenge - 6h	67.820 km	4
2017
04.06	78km	24. Ultramarathon Okumusashi	7:48:11 h	161
23.04	100km	27th Fuji 5 Lakes 100 km Challenge	9:41:16 h	99
2016
24.04	100km	26th Fuji 5 Lakes 100 km Challenge	9:11:08 h	43
2015
19.12	6h	10th Jingu Gaien Ultramarathon 6 Hour	63.578 km	2 🥈
06.06	100km	3rd Tokyo Shibamata 100 km	9:24:34 h	71
19.04	100km	25th Fuji 5 Lakes 100 km Challenge	10:28:34 h	178
2014
20.04	100km	24th Fuji 5 Lakes 100 km Challenge	11:51:10 h	401

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	21/4/2019	29th Fuji 5 Lakes 100 km Challenge	100,00	×3
✓ 2	24/6/2018	33. Lake Saroma 100 km Ultramarathon	100,00	×3
✓ 3	22/4/2018	28th Fuji 5 Lakes 100 km Challenge	100,00	×3
✓ 4	23/4/2017	27th Fuji 5 Lakes 100 km Challenge	100,00	×3
✓ 5	24/4/2016	26th Fuji 5 Lakes 100 km Challenge	100,00	×3
✓ 6	6/6/2015	3rd Tokyo Shibamata 100 km	100,00	×3
✓ 7	19/4/2015	25th Fuji 5 Lakes 100 km Challenge	100,00	×3
✓ 8	20/4/2014	24th Fuji 5 Lakes 100 km Challenge	100,00	×3
✓ 9	2/6/2019	26. Ultramarathon Okumusashi	78,00	×2
✓ 10	3/6/2018	25. Ultramarathon Okumusashi	78,00	×2
✓ 11	4/6/2017	24. Ultramarathon Okumusashi	78,00	×2
✓ 12	17/3/2018	8th Iikoto Challenge - 6h	67,82	×2
✓ 13	19/12/2015	10th Jingu Gaien Ultramarathon 6 Hour	63,58	×1