Norihiko (奥林宜彦) Okubayashi

Ultrarunner since 2017

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

6,6%

Rank quotient ?This runner's calculation uses 17 eligible race(s): Σ(rank − 1) = 826; Σ finishers = 12 585. 826 / 12 585 × 100 = 6.56%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed17

Km — ultra races1 692 km

> 100 km4

> 160 km1

> 24h1

Longest race178,5 km

22th 24-hour relay & solo marathon Kobe — 30/7/2022

Km per year (ultra races)

179

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 km9h27'46 6 h68,40 km 12 h123,20 km 24 h178,50 km

HISTORY

17 race(s)

Date		Race	Perf.	Rk
2025
18.05	68km	31th Yatsugatake Nobeyama 68 km	7:21:48 h	30
2024
19.05	68km	30th Yatsugatake Nobeyama 68 km	6:56:49 h	18
2023
21.05	71km	29th Yatsugatake Nobeyama 71 km	6:53:29 h	8
2022
30.07	24h	22th 24-hour relay & solo marathon Kobe	178.500 km	6
2019
15.09	100km	19th Tango 100 km Ultramarathon	11:44:26 h	234
27.07	6h	10th Lake Miyagase 24-hour Relay Marathon	68.400 km	4
09.06	100km	8th Hida Takayama 100 km Ultramarathon	9:44:12 h	111
19.05	100km	25th Yatsugatake Nobeyama 100 km	9:42:09 h	39
21.04	118km	29th Fuji 5 Lakes 118 km Challenge	11:16:45 h	25
24.03	100km	1st Ibaraki 100k Ultra Marathon	9:43:03 h	79
2018
29.09	12h	3rd Coedo Kawagoe Running Fest 12-hours run	123.200 km	2 🥈
09.09	100km	6th 100 km Ultramarathon Hakusan-Shirakawago	9:31:06 h	25
30.06	8h	24th 8-Hour Endurance Race Tokorozawa	78.400 km	16
10.06	100km	7th Hida Takayama 100 km Ultramarathon	9:27:46 h	49
20.05	100km	24th Yatsugatake Nobeyama 100 km	10:13:01 h	93
22.04	118km	28th Fuji 5 Lakes 118 km Challenge	11:24:53 h	24
2017
11.06	100km	6th Hida Takayama 100 km Ultramarathon	9:37:54 h	80

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	30/7/2022	22th 24-hour relay & solo marathon Kobe	178,50	×5
✓ 2	29/9/2018	3rd Coedo Kawagoe Running Fest 12-hours run	123,20	×3
✓ 3	21/4/2019	29th Fuji 5 Lakes 118 km Challenge	118,00	×3
✓ 4	22/4/2018	28th Fuji 5 Lakes 118 km Challenge	118,00	×3
✓ 5	15/9/2019	19th Tango 100 km Ultramarathon	100,00	×2
✓ 6	9/6/2019	8th Hida Takayama 100 km Ultramarathon	100,00	×2
✓ 7	19/5/2019	25th Yatsugatake Nobeyama 100 km	100,00	×2
✓ 8	24/3/2019	1st Ibaraki 100k Ultra Marathon	100,00	×2
✓ 9	9/9/2018	6th 100 km Ultramarathon Hakusan-Shirakawago	100,00	×2
✓ 10	10/6/2018	7th Hida Takayama 100 km Ultramarathon	100,00	×2
✓ 11	20/5/2018	24th Yatsugatake Nobeyama 100 km	100,00	×2
✓ 12	11/6/2017	6th Hida Takayama 100 km Ultramarathon	100,00	×2
✓ 13	30/6/2018	24th 8-Hour Endurance Race Tokorozawa	78,40	×2
✓ 14	21/5/2023	29th Yatsugatake Nobeyama 71 km	71,00	×2
✓ 15	27/7/2019	10th Lake Miyagase 24-hour Relay Marathon	68,40	×1
✓ 16	18/5/2025	31th Yatsugatake Nobeyama 68 km	68,00	×1
✓ 17	19/5/2024	30th Yatsugatake Nobeyama 68 km	68,00	×1