Ken (大内健) Ouchi

Born : 1965 Cat. M60 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

21,6%

Rank quotient ?This runner's calculation uses 104 eligible race(s): Σ(rank − 1) = 7 519; Σ finishers = 34 826. 7 519 / 34 826 × 100 = 21.59%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed104

Km — ultra races12 406 km

> 100 km43

> 160 km22

> 200 km14

> 24h17

Longest race263,0 km

4th Michinoku Tsugaru Journey Run 263K — 13/7/2019

Km per year (ultra races)

530

2022

635

2023

549

2024

693

2025

449

2026

Race types (share of distance)

Road100,0%

Wins & podiums (ultra)

🏆 Win2

🏆 Win M2

🏅 Top 32

🏅 Top 3 M2

Longest winning streak1

Current streak0

Records

50 km5h18'00 100 km9h13'23 12 h123,32 km 24 h210,77 km

HISTORY

104 race(s) · 7 split(s) nested

Date		Race	Perf.	Rk
2026
14.06	50km	20th Iwate Ginga 50km Marathon Challenge	5:49:55 h	52
23.05	24h	IAU 24h Asia and Oceania Championships Open	135.000 km	79
23.05	12h	IAU 24h Asia and Oceania Championships Open - 12h Split	95.000 km	51
19.04	100km	7th Yamadera Zao 100 km Ultra Marathon	12:37:24 h	39
28.03	24h	17th Jingu Gaien 24 Hour Challenge	163.947 km	41
2025
14.12	100km	6th Tobishima Ultra Marathon	11:53:49 h	50
19.07	154km	9th Michinoku Tsugaru Journey Run 154K	26:16:05 h	13
15.06	100km	18. Okinoshima 100km Ultra Marathon	12:27:44 h	91
08.06	50km	19th Iwate Ginga 50km Marathon Challenge	5:18:00 h	41
24.05	24h	4th Hirosaki 24h Ultra Run	115.000 km	82
20.04	100km	6th Yamadera Zao 100 km Ultra Marathon	12:21:25 h	27
08.03	24h	16th Jingu Gaien 24 Hour Challenge	74.175 km	96
08.03	6h	16th Jingu Gaien 24 Hour Challenge - 6h Split	56.956 km	62
08.03	12h	16th Jingu Gaien 24 Hour Challenge -12h Split	74.175 km	89
2024
08.12	100km	5th Tobishima Ultra Marathon	12:09:26 h	88
13.07	154km	8th Michinoku Tsugaru Journey Run 154K	25:53:43 h	26
09.06	50km	18th Iwate Ginga 50km Marathon Challenge	5:23:02 h	67
21.05	24h	3rd Hirosaki 24h Ultra Run	145.329 km	56
21.04	100km	5th Yamadera Zao 100 km Ultra Marathon	11:40:28 h	30
2023
10.12	100km	4th Tobishima Ultra Marathon	12:06:51 h	61
17.09	127km	6th Utsukushima Fukushima Journey Run 127K	19:12:05 h	9
27.05	24h	2nd Hirosaki 24h Ultra Run	137.186 km	48
23.04	100km	4th Yamadera Zao 100 km Ultra Marathon	12:39:16 h	44
11.03	24h	15th Jingu Gaien 24 Hour Challenge	171.074 km	51
11.03	6h	15th Jingu Gaien 24 Hour Challenge - 6h Split	54.284 km	64
11.03	12h	15th Jingu Gaien 24 Hour Challenge -12h Split	100.624 km	54
2022
17.09	251km	5th Utsukushima Fukushima Journey Run 251K	45:18:39 h	18
20.08	101km	9th World Cultural Heritage "Fuji" Foot Race	14:04:00 h	39
12.06	100km	16th Iwate Ginga 100km Marathon Challenge	13:57:06 h	739
05.06	78km	29. Ultramarathon Okumusashi	8:49:29 h	286
2020
22.02	206km	10th Little Edo Oedo 205k	30:43:22 h	59
2019
19.10	100km	4th Iki 100 km Ultra Marathon	10:47:22 h	40
07.09	95km	3rd Miyagi Yumeguri Ultra Marathon - 95 km	11:07:50 h	1 🏆
17.08	101km	7th World Cultural Heritage "Fuji" Foot Race	13:36:25 h	37
13.07	263km	4th Michinoku Tsugaru Journey Run 263K	44:31:06 h	37
16.06	100km	14. Okinoshima 100km Ultra Marathon	9:44:38 h	33
09.06	100km	15th Iwate Ginga 100km Marathon Challenge	11:59:56 h	265
21.04	100km	1st Yamadera Zao 100 km Ultra Marathon	12:45:33 h	22
21.04	71km	29th Fuji 5 Lakes 71 km Challenge	8:15:56 h	153
23.02	204km	9th Little Edo Oedo 200k	30:35:54 h	74
2018
10.11	24h	13th Jingu Gaien 24 Hour Challenge	164.571 km	74
20.10	100km	3rd Iki 100 km Ultra Marathon	10:46:04 h	58
01.09	105k	2nd Miyagi Yumeguri Ultra Marathon - 105 km	13:10:26 h	5
19.08	101km	6th World Cultural Heritage "Fuji" Foot Race	13:07:00 h	32
14.07	263km	3rd Michinoku Tsugaru Journey Run 263K	46:10:39 h	30
17.06	100km	13. Okinoshima 100km Ultra Marathon	9:54:31 h	24
14.04	102km	4th Okuizumo Ultra Orochi 100km Tooashi	10:53:07 h	29
03.03	204km	8th Little Edo Oedo 200k	30:49:07 h	73
2017
11.11	24h	12th Jingu Gaien 24 Hour Challenge	197.652 km	37
21.10	100km	2nd Iki 100 km Ultra Marathon	9:50:52 h	16
02.09	115km	1st Miyagi Yumeguri Ultra Marathon - 115 km	12:03:02 h	12
05.08	24h	17th 24-hour relay & solo marathon Kobe	159.800 km	6
15.07	250km	2nd Michinoku Tsugaru Journey Run 250K	43:49:52 h	25
02.07	100km	1st Nikko 100km Ultramarathon	10:51:58 h	155
18.06	100km	12. Okinoshima 100km Ultra Marathon	10:20:54 h	45
28.05	100km	24th Ebisu-Daikoku 100 km Marathon	10:23:01 h	42
21.05	77km	22th Saba Highway Ultramarathon	9:11:06 h	75
15.04	102km	3rd Okuizumo Ultra Orochi 100km Tooashi	10:49:22 h	32
04.03	204km	7th Little Edo Oedo 200k	28:49:38 h	50
2016
17.12	24h	11th Jingu Gaien 24 Hour Challenge	150.999 km	91
16.10	100km	22nd River Shimanto 100km	9:31:14 h	89
17.07	200km	1st Michinoku Tsugaru Journey Run 200K	27:41:58 h	9
19.06	100km	11. Okinoshima 100km Ultra Marathon	9:21:12 h	15
12.06	72km	5th Hida Takayama 72 km Ultramarathon	7:26:10 h	43
28.05	103km	5th Tojinbo 103 km Ultramarathon	9:44:27 h	5
05.03	204km	6th Little Edo Oedo 200k	27:36:42 h	19
2015
19.12	24h	10th Jingu Gaien 24 Hour Challenge	210.769 km	17
18.10	100km	21st River Shimanto 100km	9:33:49 h	69
21.06	100km	10. Okinoshima 100km Ultra Marathon	9:21:00 h	19
14.06	100km	11th Iwate Ginga 100km Marathon Challenge	11:32:48 h	269
16.05	103km	4th Tojinbo 103 km Ultramarathon	10:09:01 h	7
28.02	203km	5th Little Edo Oedo 200k	30:11:15 h	56
2014
08.11	24h	9th Jingu Gaien 24 Hour Challenge	209.065 km	19
08.11	6h	9th Jingu Gaien 24 Hour Challenge - 6h Split	60.930 km	37
08.11	12h	9th Jingu Gaien 24 Hour Challenge -12h Split	116.561 km	28
30.08	103km	2nd World Cultural Heritage "Fuji" Foot Race	12:16:00 h	7
27.07	77km	21. Ultramarathon Okumusashi	8:53:33 h	206
06.07	8h	20th 8-Hour Endurance Race Tokorozawa - 3 tai	45.444 km	94
21.06	24h	13. Tokyo Challenge 24 hours	143.320 km	43
08.06	100km	10th Iwate Ginga 100km Marathon Challenge	10:46:13 h	190
10.05	103km	3rd Tojinbo 103 km Ultramarathon	10:15:02 h	9
06.04	100km	65. Tsurunuma 100 km	9:30:54 h	11
01.03	203km	4th Little Edo Oedo 200k	29:30:14 h	37
2013
09.11	24h	8th Jingu Gaien 24 Hour Challenge	192.269 km	33
28.07	77km	20. Ultramarathon Okumusashi	7:44:48 h	143
07.07	8h	19th 8-Hour Endurance Race Tokorozawa - 3 tai	61.674 km	38
09.06	100km	9th Iwate Ginga 100km Marathon Challenge	12:24:19 h	409
07.04	100km	63. Tsurunuma 100 km	9:14:27 h	5
02.03	203km	3rd Little Edo Oedo 200k	28:52:49 h	26
2012
07.10	24h	7th Jingu Gaien 24 Hour Challenge	181.252 km	31
05.08	77km	19. Ultramarathon Okumusashi	7:32:20 h	85
08.07	8h	18th 8-Hour Endurance Race Tokorozawa - 3 tai	71.412 km	34
16.06	24h	11. Tokyo Challenge 24 hours	161.600 km	19
10.06	100km	8th Iwate Ginga 100km Marathon Challenge	11:10:45 h	198
07.04	70km	7th Toda Saiko 70 km	6:39:14 h	28
01.04	100km	61. Tsurunuma 100 km	9:13:23 h	6
2011
15.10	12h	6th Jingu Gaien Ultramarathon 12 Hour	123.318 km	1 🏆
25.09	100km	14th Muraoka 100 km Ultra Marathon	9:49:21 h	14
07.08	77km	18. Ultramarathon Okumusashi	7:40:56 h	116
10.07	8h	17th 8-Hour Endurance Race Tokorozawa - 3 tai	64.920 km	19
19.06	100km	6. Okinoshima 100km Ultra Marathon	10:46:20 h	54
12.06	100km	7th Iwate Ginga 100km Marathon Challenge	12:47:44 h	340
2010
09.10	100km	8th Echigo Kubikino 100km Ultramarathon	10:54:28 h	220
26.09	100km	20. Akita Nairiku 100km Marathon	11:14:35 h	192
01.08	77km	17. Ultramarathon Okumusashi	8:49:43 h	235
04.07	8h	16th 8-Hour Endurance Race Tokorozawa - 3 tai	61.674 km	24
20.06	100km	5. Okinoshima 100km Ultra Marathon	11:40:22 h	60
04.04	100km	57. Tsurunuma 100 km	10:07:18 h	21
2009
18.10	100km	15th River Shimanto 100km	10:26:41 h	175
27.09	88km	12th Muraoka 88 km Ultra Marathon	10:21:23 h	19
30.08	52km	56. Tsurunuma 52 km	5:06:30 h	40

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	13/7/2019	4th Michinoku Tsugaru Journey Run 263K	263,00	×2
✓ 2	14/7/2018	3rd Michinoku Tsugaru Journey Run 263K	263,00	×2
✓ 3	17/9/2022	5th Utsukushima Fukushima Journey Run 251K	251,00	×2
✓ 4	15/7/2017	2nd Michinoku Tsugaru Journey Run 250K	250,00	×2
✓ 5	19/12/2015	10th Jingu Gaien 24 Hour Challenge	210,77	×2
✓ 6	8/11/2014	9th Jingu Gaien 24 Hour Challenge	209,07	×2
✓ 7	22/2/2020	10th Little Edo Oedo 205k	206,00	×2
✓ 8	23/2/2019	9th Little Edo Oedo 200k	204,00	×2
✓ 9	3/3/2018	8th Little Edo Oedo 200k	204,00	×2
✓ 10	4/3/2017	7th Little Edo Oedo 200k	204,00	×2
✓ 11	5/3/2016	6th Little Edo Oedo 200k	204,00	×2
✓ 12	28/2/2015	5th Little Edo Oedo 200k	203,00	×2
✓ 13	1/3/2014	4th Little Edo Oedo 200k	203,00	×2
✓ 14	2/3/2013	3rd Little Edo Oedo 200k	203,00	×2
✓ 15	17/7/2016	1st Michinoku Tsugaru Journey Run 200K	200,00	×2
✓ 16	11/11/2017	12th Jingu Gaien 24 Hour Challenge	197,65	×2
✓ 17	9/11/2013	8th Jingu Gaien 24 Hour Challenge	192,27	×1
✓ 18	7/10/2012	7th Jingu Gaien 24 Hour Challenge	181,25	×1
✓ 19	11/3/2023	15th Jingu Gaien 24 Hour Challenge	171,07	×1
✓ 20	10/11/2018	13th Jingu Gaien 24 Hour Challenge	164,57	×1
✓ 21	28/3/2026	17th Jingu Gaien 24 Hour Challenge	163,95	×1
✓ 22	16/6/2012	11. Tokyo Challenge 24 hours	161,60	×1
✓ 23	5/8/2017	17th 24-hour relay & solo marathon Kobe	159,80	×1
✓ 24	19/7/2025	9th Michinoku Tsugaru Journey Run 154K	154,00	×1
✓ 25	13/7/2024	8th Michinoku Tsugaru Journey Run 154K	154,00	×1
✓ 26	17/12/2016	11th Jingu Gaien 24 Hour Challenge	151,00	×1
✓ 27	21/5/2024	3rd Hirosaki 24h Ultra Run	145,33	×1
✓ 28	21/6/2014	13. Tokyo Challenge 24 hours	143,32	×1
✓ 29	27/5/2023	2nd Hirosaki 24h Ultra Run	137,19	×1
✓ 30	23/5/2026	IAU 24h Asia and Oceania Championships Open	135,00	×1
✓ 31	17/9/2023	6th Utsukushima Fukushima Journey Run 127K	127,00	×1
✓ 32	15/10/2011	6th Jingu Gaien Ultramarathon 12 Hour	123,32	×1
✓ 33	24/5/2025	4th Hirosaki 24h Ultra Run	115,00	×1
✓ 34	2/9/2017	1st Miyagi Yumeguri Ultra Marathon - 115 km	115,00	×1
✓ 35	28/5/2016	5th Tojinbo 103 km Ultramarathon	103,00	×1
✓ 36	16/5/2015	4th Tojinbo 103 km Ultramarathon	103,00	×1
✓ 37	30/8/2014	2nd World Cultural Heritage "Fuji" Foot Race	103,00	×1
✓ 38	10/5/2014	3rd Tojinbo 103 km Ultramarathon	103,00	×1
✓ 39	14/4/2018	4th Okuizumo Ultra Orochi 100km Tooashi	102,00	×1
✓ 40	15/4/2017	3rd Okuizumo Ultra Orochi 100km Tooashi	102,00	×1
✓ 41	20/8/2022	9th World Cultural Heritage "Fuji" Foot Race	101,00	×1
✓ 42	17/8/2019	7th World Cultural Heritage "Fuji" Foot Race	101,00	×1
✓ 43	19/8/2018	6th World Cultural Heritage "Fuji" Foot Race	101,00	×1
✓ 44	19/4/2026	7th Yamadera Zao 100 km Ultra Marathon	100,00	×1
✓ 45	14/12/2025	6th Tobishima Ultra Marathon	100,00	×1
✓ 46	15/6/2025	18. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 47	20/4/2025	6th Yamadera Zao 100 km Ultra Marathon	100,00	×1
✓ 48	8/12/2024	5th Tobishima Ultra Marathon	100,00	×1
✓ 49	21/4/2024	5th Yamadera Zao 100 km Ultra Marathon	100,00	×1
✓ 50	10/12/2023	4th Tobishima Ultra Marathon	100,00	×1
✓ 51	23/4/2023	4th Yamadera Zao 100 km Ultra Marathon	100,00	×1
✓ 52	12/6/2022	16th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 53	19/10/2019	4th Iki 100 km Ultra Marathon	100,00	×1
✓ 54	16/6/2019	14. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 55	9/6/2019	15th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 56	21/4/2019	1st Yamadera Zao 100 km Ultra Marathon	100,00	×1
✓ 57	20/10/2018	3rd Iki 100 km Ultra Marathon	100,00	×1
✓ 58	17/6/2018	13. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 59	21/10/2017	2nd Iki 100 km Ultra Marathon	100,00	×1
✓ 60	2/7/2017	1st Nikko 100km Ultramarathon	100,00	×1
✓ 61	18/6/2017	12. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 62	28/5/2017	24th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 63	16/10/2016	22nd River Shimanto 100km	100,00	×1
✓ 64	19/6/2016	11. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 65	18/10/2015	21st River Shimanto 100km	100,00	×1
✓ 66	21/6/2015	10. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 67	14/6/2015	11th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 68	8/6/2014	10th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 69	6/4/2014	65. Tsurunuma 100 km	100,00	×1
✓ 70	9/6/2013	9th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 71	7/4/2013	63. Tsurunuma 100 km	100,00	×1
✓ 72	10/6/2012	8th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 73	1/4/2012	61. Tsurunuma 100 km	100,00	×1
✓ 74	25/9/2011	14th Muraoka 100 km Ultra Marathon	100,00	×1
✓ 75	19/6/2011	6. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 76	12/6/2011	7th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 77	9/10/2010	8th Echigo Kubikino 100km Ultramarathon	100,00	×1
✓ 78	26/9/2010	20. Akita Nairiku 100km Marathon	100,00	×1
✓ 79	20/6/2010	5. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 80	4/4/2010	57. Tsurunuma 100 km	100,00	×1
✓ 81	18/10/2009	15th River Shimanto 100km	100,00	×1
✓ 82	7/9/2019	3rd Miyagi Yumeguri Ultra Marathon - 95 km	95,00	—
✓ 83	27/9/2009	12th Muraoka 88 km Ultra Marathon	88,00	—
84	5/6/2022	29. Ultramarathon Okumusashi	78,00	—
85	21/5/2017	22th Saba Highway Ultramarathon	77,00	—
86	27/7/2014	21. Ultramarathon Okumusashi	77,00	—
87	28/7/2013	20. Ultramarathon Okumusashi	77,00	—
88	5/8/2012	19. Ultramarathon Okumusashi	77,00	—
89	7/8/2011	18. Ultramarathon Okumusashi	77,00	—
90	1/8/2010	17. Ultramarathon Okumusashi	77,00	—
91	8/3/2025	16th Jingu Gaien 24 Hour Challenge	74,18	—
92	12/6/2016	5th Hida Takayama 72 km Ultramarathon	72,00	—
93	8/7/2012	18th 8-Hour Endurance Race Tokorozawa - 3 tai	71,41	—
94	7/4/2012	7th Toda Saiko 70 km	70,00	—
95	10/7/2011	17th 8-Hour Endurance Race Tokorozawa - 3 tai	64,92	—
96	7/7/2013	19th 8-Hour Endurance Race Tokorozawa - 3 tai	61,67	—
97	4/7/2010	16th 8-Hour Endurance Race Tokorozawa - 3 tai	61,67	—
98	30/8/2009	56. Tsurunuma 52 km	52,00	—
99	14/6/2026	20th Iwate Ginga 50km Marathon Challenge	50,00	—
100	8/6/2025	19th Iwate Ginga 50km Marathon Challenge	50,00	—
101	9/6/2024	18th Iwate Ginga 50km Marathon Challenge	50,00	—
102	6/7/2014	20th 8-Hour Endurance Race Tokorozawa - 3 tai	45,44	—