Kosuke (大木宏亮) Ohki

Born : 1979 Cat. M45 Ultrarunner since 2009

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

42,1%

Rank quotient ?This runner's calculation uses 62 eligible race(s): Σ(rank − 1) = 17 585; Σ finishers = 41 747. 17 585 / 41 747 × 100 = 42.12%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed62

Km — ultra races7 411 km

> 100 km15

> 160 km10

> 200 km9

Longest race320,0 km

Tachibana Bay Coast 320 Ultra Marathon — 1/11/2019

Km per year (ultra races)

400

2022

380

2023

500

2024

100

2025

2026

Race types (share of distance)

Road98,7%

Trail1,3%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M1

Longest winning streak0

Current streak0

Records

100 km10h14'41 50 mi10h52'28

HISTORY

62 race(s)

Date		Race	Perf.	Rk
2025
15.06	100km	18. Okinoshima 100km Ultra Marathon	13:56:35 h	209
2024
15.12	100km	7th Okinawa 100km Ultramarathon	13:20:33 h	380
19.10	100km	7th Iki 100 km Ultra Marathon	12:34:54 h	130
06.10	100km	5th Mine Akiyoshidai Geopark Ultra Marathon	12:48:09 h	46
15.09	100km	22th Tango 100 km Ultramarathon	13:56:05 h	780
16.06	100km	17. Okinoshima 100km Ultra Marathon	14:02:12 h	223
2023
17.12	100km	6th Okinawa 100km Ultramarathon	12:27:54 h	284
21.10	100km	6th Iki 100 km Ultra Marathon	13:26:27 h	251
18.06	100km	16. Okinoshima 100km Ultra Marathon	13:56:14 h	174
04.06	80km	2nd Kyokaido Ultra aranic - Osaka	10:52:28 h	12
2022
15.10	100km	5th Iki 100 km Ultra Marathon	12:51:07 h	109
09.10	100km	14th Echigo Kubikino 100km Ultramarathon	13:19:13 h	645
19.06	100km	15. Okinoshima 100km Ultra Marathon	13:24:57 h	113
22.05	100km	28th Yatsugatake Nobeyama 100 km	13:31:47 h	694
2020
19.09	123km	3rd Utsukushima Fukushima Journey Run 123K	18:32:19 h	64
22.02	206km	10th Little Edo Oedo 205k	30:25:04 h	55
2019
15.12	100km	4th Okinawa 100km Ultramarathon	11:13:18 h	106
01.11	320km	Tachibana Bay Coast 320 Ultra Marathon	2d 07:50:25 h	11
19.10	51.4km	10th Inagawa 100km Ultra-Marathon	5:30:01 h	79
29.09	100km	3rd Yasaka Ultra Marathon in Hamada - 100 km	13:36:03 h	35
15.09	100km	19th Tango 100 km Ultramarathon	12:28:19 h	372
13.07	263km	4th Michinoku Tsugaru Journey Run 263K	45:51:59 h	44
30.06	100km	34. Lake Saroma 100 km Ultramarathon	10:14:41 h	467
16.06	100km	14. Okinoshima 100km Ultra Marathon	11:19:10 h	110
19.05	100km	25th Yatsugatake Nobeyama 100 km	11:40:42 h	302
04.05	217km	13th Nagasaki Tachibana Gulf Coast Super Maranic 217	33:24:00 h	14
21.04	118km	29th Fuji 5 Lakes 118 km Challenge	13:27:23 h	153
24.03	100km	1st Ibaraki 100k Ultra Marathon	10:35:18 h	153
23.02	204km	9th Little Edo Oedo 200k	30:05:23 h	61
2018
01.12	200km	3rd Santo Ultra Maranic - Santo Course	30:10:00 h	3 🥉
02.11	105km	Tachibana Bay Coast 105 Ultra Marathon	13:53:05 h	43
16.09	100km	18th Tango 100 km Ultramarathon	13:06:01 h	586
14.07	263km	3rd Michinoku Tsugaru Journey Run 263K	2d 02:23:26 h	86
24.06	100km	33. Lake Saroma 100 km Ultramarathon	10:44:46 h	680
17.06	100km	13. Okinoshima 100km Ultra Marathon	12:33:42 h	144
27.05	100km	25th Ebisu-Daikoku 100 km Marathon	12:21:43 h	119
20.05	100km	24th Yatsugatake Nobeyama 100 km	12:38:19 h	567
14.04	102km	4th Okuizumo Ultra Orochi 100km Tooashi	11:53:10 h	72
03.03	204km	8th Little Edo Oedo 200k	28:48:11 h	41
2017
17.12	100km	2nd Okinawa 100km Ultramarathon	10:55:01 h	69
25.06	100km	32. Lake Saroma 100 km Ultramarathon	11:46:48 h	1093
21.05	100km	23rd Yatsugatake Nobeyama 100 km	12:51:33 h	486
03.05	140km	29. Yamaguchi 100 Hagi-O-Kan Maranic 140 km	21:46:36 h	90
04.03	204km	7th Little Edo Oedo 200k	29:06:23 h	53
2016
18.12	100km	1st Okinawa 100km Ultramarathon	12:27:58 h	137
09.10	100km	11th Echigo Kubikino 100km Ultramarathon	11:47:52 h	450
25.09	100km	19th Muraoka 100 km Ultra Marathon	13:47:57 h	397
11.09	100km	1st Koyasan and Ryujin-Onsen 100 km Ultra Marathon	12:58:47 h	158
26.06	100km	31. Lake Saroma 100 km Ultramarathon	10:37:47 h	722
12.06	100km	12th Iwate Ginga 100km Marathon Challenge	12:24:34 h	428
22.05	77km	21th Saba Highway Ultramarathon	10:37:09 h	230
27.03	100km	2nd Osaka Yodogawa 100 km Ultra Marathon	10:26:33 h	52
05.03	204km	6th Little Edo Oedo 200k	31:24:55 h	77
2015
18.10	100km	4th Noto Peninsula 100 km Ultra Marathon	12:45:11 h	166
28.06	100km	30. Lake Saroma 100 km Ultramarathon	11:20:24 h	1052
29.03	100km	1st Osaka Yodogawa 100 km Ultra Marathon	11:28:12 h	213
11.01	100km	25th Miyako 100 km Ultramarathon	12:22:16 h	248
2014
22.11	60km	1st Kiso-Sansen 60 km Ultra-Marathon	6:37:33 h	483
29.06	100km	29. Lake Saroma 100 km Ultramarathon	12:53:00 h	1659
2013
20.10	100km	19th River Shimanto 100km	12:51:53 h	626
16.06	100km	8. Okinoshima 100km Ultra Marathon	14:12:59 h	276
2009
24.05	70km	1st 70 km Ultra Maranic Osaka	9:40:22 h	65

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	1/11/2019	Tachibana Bay Coast 320 Ultra Marathon	320,00	×4
✓ 2	13/7/2019	4th Michinoku Tsugaru Journey Run 263K	263,00	×3
✓ 3	14/7/2018	3rd Michinoku Tsugaru Journey Run 263K	263,00	×3
✓ 4	4/5/2019	13th Nagasaki Tachibana Gulf Coast Super Maranic 217	217,00	×2
✓ 5	22/2/2020	10th Little Edo Oedo 205k	206,00	×2
✓ 6	23/2/2019	9th Little Edo Oedo 200k	204,00	×2
✓ 7	3/3/2018	8th Little Edo Oedo 200k	204,00	×2
✓ 8	4/3/2017	7th Little Edo Oedo 200k	204,00	×2
✓ 9	5/3/2016	6th Little Edo Oedo 200k	204,00	×2
✓ 10	1/12/2018	3rd Santo Ultra Maranic - Santo Course	200,00	×2
✓ 11	3/5/2017	29. Yamaguchi 100 Hagi-O-Kan Maranic 140 km	140,00	×1
✓ 12	19/9/2020	3rd Utsukushima Fukushima Journey Run 123K	123,00	×1
✓ 13	21/4/2019	29th Fuji 5 Lakes 118 km Challenge	118,00	×1
✓ 14	2/11/2018	Tachibana Bay Coast 105 Ultra Marathon	105,00	×1
✓ 15	14/4/2018	4th Okuizumo Ultra Orochi 100km Tooashi	102,00	×1
✓ 16	15/6/2025	18. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 17	15/12/2024	7th Okinawa 100km Ultramarathon	100,00	×1
✓ 18	19/10/2024	7th Iki 100 km Ultra Marathon	100,00	×1
✓ 19	6/10/2024	5th Mine Akiyoshidai Geopark Ultra Marathon	100,00	×1
✓ 20	15/9/2024	22th Tango 100 km Ultramarathon	100,00	×1
✓ 21	16/6/2024	17. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 22	17/12/2023	6th Okinawa 100km Ultramarathon	100,00	×1
✓ 23	21/10/2023	6th Iki 100 km Ultra Marathon	100,00	×1
✓ 24	18/6/2023	16. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 25	15/10/2022	5th Iki 100 km Ultra Marathon	100,00	×1
✓ 26	9/10/2022	14th Echigo Kubikino 100km Ultramarathon	100,00	×1
✓ 27	19/6/2022	15. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 28	22/5/2022	28th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 29	15/12/2019	4th Okinawa 100km Ultramarathon	100,00	×1
✓ 30	29/9/2019	3rd Yasaka Ultra Marathon in Hamada - 100 km	100,00	×1
✓ 31	15/9/2019	19th Tango 100 km Ultramarathon	100,00	×1
✓ 32	30/6/2019	34. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 33	16/6/2019	14. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 34	19/5/2019	25th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 35	24/3/2019	1st Ibaraki 100k Ultra Marathon	100,00	×1
✓ 36	16/9/2018	18th Tango 100 km Ultramarathon	100,00	×1
✓ 37	24/6/2018	33. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 38	17/6/2018	13. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 39	27/5/2018	25th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 40	20/5/2018	24th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 41	17/12/2017	2nd Okinawa 100km Ultramarathon	100,00	×1
✓ 42	25/6/2017	32. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 43	21/5/2017	23rd Yatsugatake Nobeyama 100 km	100,00	×1
✓ 44	18/12/2016	1st Okinawa 100km Ultramarathon	100,00	×1
✓ 45	9/10/2016	11th Echigo Kubikino 100km Ultramarathon	100,00	×1
✓ 46	25/9/2016	19th Muraoka 100 km Ultra Marathon	100,00	×1
✓ 47	11/9/2016	1st Koyasan and Ryujin-Onsen 100 km Ultra Marathon	100,00	×1
✓ 48	26/6/2016	31. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 49	12/6/2016	12th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 50	27/3/2016	2nd Osaka Yodogawa 100 km Ultra Marathon	100,00	×1
✓ 51	18/10/2015	4th Noto Peninsula 100 km Ultra Marathon	100,00	×1
✓ 52	28/6/2015	30. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 53	29/3/2015	1st Osaka Yodogawa 100 km Ultra Marathon	100,00	×1
✓ 54	11/1/2015	25th Miyako 100 km Ultramarathon	100,00	×1
✓ 55	29/6/2014	29. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 56	20/10/2013	19th River Shimanto 100km	100,00	×1
✓ 57	16/6/2013	8. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 58	4/6/2023	2nd Kyokaido Ultra aranic - Osaka	80,00	×1
✓ 59	22/5/2016	21th Saba Highway Ultramarathon	77,00	×1
✓ 60	24/5/2009	1st 70 km Ultra Maranic Osaka	70,00	—
61	22/11/2014	1st Kiso-Sansen 60 km Ultra-Marathon	60,00	—
62	19/10/2019	10th Inagawa 100km Ultra-Marathon	51,40	—