Izumi (牛尾泉) Ushio

Born : 1953 Cat. M70 Ultrarunner since 2000

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

34,0%

Rank quotient ?This runner's calculation uses 57 eligible race(s): Σ(rank − 1) = 10 096; Σ finishers = 29 678. 10 096 / 29 678 × 100 = 34.02%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed57

Km — ultra races5 427 km

> 100 km1

Longest race102,0 km

3rd Okuizumo Ultra Orochi 100km Tooashi — 15/4/2017

Km per year (ultra races)

2022

2023

2024

124

2025

2026

Race types (share of distance)

Road88,9%

Trail11,1%

Records

100 km9h34'06

HISTORY

57 race(s)

Date		Race	Perf.	Rk
2025
19.10	60km	31th River Shimanto 60km	9:23:05 h	349
28.09	64km	28th Muraoka 64 km Ultra Marathon	8:11:56 h	358
2023
15.10	60km	29th River Shimanto 60km	7:47:44 h	199
2022
29.09	45km	25th Muraoka 45 km Ultra Marathon	6:43:25 h	750
2019
20.10	100km	25th River Shimanto 100km	12:55:17 h	732
29.09	88km	22th Muraoka 88 km Ultra Marathon	12:12:35 h	73
16.06	100km	14. Okinoshima 100km Ultra Marathon	12:53:02 h	245
12.05	100km	26th Ebisu-Daikoku 100 km Marathon	12:23:02 h	184
2018
17.06	100km	13. Okinoshima 100km Ultra Marathon	12:39:15 h	150
27.05	100km	25th Ebisu-Daikoku 100 km Marathon	12:21:53 h	120
2017
15.10	100km	23rd River Shimanto 100km	12:56:14 h	801
24.09	88km	20th Muraoka 88 km Ultra Marathon	11:10:20 h	47
18.06	100km	12. Okinoshima 100km Ultra Marathon	12:15:19 h	126
28.05	100km	24th Ebisu-Daikoku 100 km Marathon	11:23:02 h	93
15.04	102km	3rd Okuizumo Ultra Orochi 100km Tooashi	13:05:55 h	129
2016
25.09	88km	19th Muraoka 88 km Ultra Marathon	11:51:55 h	52
19.06	100km	11. Okinoshima 100km Ultra Marathon	12:27:48 h	145
29.05	100km	23rd Ebisu-Daikoku 100 km Marathon	10:41:37 h	90
2015
27.09	100km	18th Muraoka 100 km Ultra Marathon	11:47:48 h	96
21.06	100km	10. Okinoshima 100km Ultra Marathon	11:20:44 h	100
31.05	100km	22nd Ebisu-Daikoku 100 km Marathon	10:15:33 h	66
2014
19.10	100km	20th River Shimanto 100km	11:38:22 h	371
28.09	66km	17th Muraoka 66 km Ultra Marathon	7:54:38 h	45
25.05	100km	21st Ebisu-Daikoku 100 km Marathon	11:09:21 h	78
2013
20.10	100km	19th River Shimanto 100km	11:50:23 h	374
29.09	66km	16th Muraoka 66 km Ultra Marathon	9:06:42 h	159
16.06	100km	8. Okinoshima 100km Ultra Marathon	12:46:42 h	125
26.05	100km	20th Ebisu-Daikoku 100 km Marathon	10:51:50 h	76
2012
21.10	100km	18th River Shimanto 100km	12:25:39 h	495
24.06	100km road race	27. Lake Saroma 100 km Ultramarathon	11:22:19 h	879
27.05	100km	19th Ebisu-Daikoku 100 km Marathon	10:40:08 h	53
2011
29.05	100km	18th Ebisu-Daikoku 100 km Marathon	10:40:56 h	85
2010
17.10	100km	16th River Shimanto 100km	10:48:35 h	200
27.06	100km	10th Nichinan Orochi 100 km Marathon	10:52:20 h	85
30.05	100km	17th Ebisu-Daikoku 100 km Marathon	9:54:47 h	44
2009
18.10	100km	15th River Shimanto 100km	10:18:08 h	150
28.06	100km	9th Nichinan Orochi 100 km Marathon	10:50:40 h	47
31.05	100km	16th Ebisu-Daikoku 100 km Marathon	9:48:28 h	36
2008
28.09	100km	11th Muraoka 100 km Ultra Marathon	11:14:12 h	38
22.06	100km	8th Nichinan Orochi 100 km Marathon	10:30:31 h	52
25.05	100km	15th Ebisu-Daikoku 100 km Marathon	10:16:29 h	30
2007
29.09	100km	10th Muraoka 100 km Ultra Marathon	11:31:44 h	41
24.06	100km	7th Nichinan Orochi 100 km Marathon	10:30:09 h	54
27.05	100km	14th Ebisu-Daikoku 100 km Marathon	10:07:15 h	19
2006
15.10	100km	12th River Shimanto 100km	11:05:43 h	241
25.06	100km	6th Nichinan Orochi 100 km Marathon	10:19:16 h	55
28.05	100km	13th Ebisu-Daikoku 100 km Marathon	9:52:20 h	13
2005
26.06	100km	Open Race at IAU 100km WC Yubetsu (20. Lake Saroma 100 km Ultramarathon)	11:16:10 h	632
29.05	100km	12th Ebisu-Daikoku 100 km Marathon	9:34:06 h	12
2004
17.10	100km	10th River Shimanto 100km	10:25:11 h	184
20.06	100km	4th Nichinan Orochi 100 km Marathon	10:48:06 h	48
30.05	100km	11th Ebisu-Daikoku 100 km Marathon	9:52:45 h	17
2003
19.10	100km	9th River Shimanto 100km	11:44:03 h	436
25.05	100km	10th Ebisu-Daikoku 100 km Marathon	9:53:11 h	16
2002
26.05	100km	9th Ebisu-Daikoku 100 km Marathon	10:08:16 h	8
2001
27.05	100km	8th Ebisu-Daikoku 100 km Marathon	11:13:46 h	10
2000
28.05	100km	7th Ebisu-Daikoku 100 km Marathon	12:25:36 h	40

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	15/4/2017	3rd Okuizumo Ultra Orochi 100km Tooashi	102,00	×1
✓ 2	20/10/2019	25th River Shimanto 100km	100,00	×1
✓ 3	16/6/2019	14. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 4	12/5/2019	26th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 5	17/6/2018	13. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 6	27/5/2018	25th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 7	15/10/2017	23rd River Shimanto 100km	100,00	×1
✓ 8	18/6/2017	12. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 9	28/5/2017	24th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 10	19/6/2016	11. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 11	29/5/2016	23rd Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 12	27/9/2015	18th Muraoka 100 km Ultra Marathon	100,00	×1
✓ 13	21/6/2015	10. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 14	31/5/2015	22nd Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 15	19/10/2014	20th River Shimanto 100km	100,00	×1
✓ 16	25/5/2014	21st Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 17	20/10/2013	19th River Shimanto 100km	100,00	×1
✓ 18	16/6/2013	8. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 19	26/5/2013	20th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 20	21/10/2012	18th River Shimanto 100km	100,00	×1
✓ 21	24/6/2012	27. Lake Saroma 100 km Ultramarathon (JPN)	100,00	×1
✓ 22	27/5/2012	19th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 23	29/5/2011	18th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 24	17/10/2010	16th River Shimanto 100km	100,00	×1
✓ 25	27/6/2010	10th Nichinan Orochi 100 km Marathon	100,00	×1
✓ 26	30/5/2010	17th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 27	18/10/2009	15th River Shimanto 100km	100,00	×1
✓ 28	28/6/2009	9th Nichinan Orochi 100 km Marathon	100,00	×1
✓ 29	31/5/2009	16th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 30	28/9/2008	11th Muraoka 100 km Ultra Marathon	100,00	×1
✓ 31	22/6/2008	8th Nichinan Orochi 100 km Marathon	100,00	×1
✓ 32	25/5/2008	15th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 33	29/9/2007	10th Muraoka 100 km Ultra Marathon	100,00	×1
✓ 34	24/6/2007	7th Nichinan Orochi 100 km Marathon	100,00	×1
✓ 35	27/5/2007	14th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 36	15/10/2006	12th River Shimanto 100km	100,00	×1
✓ 37	25/6/2006	6th Nichinan Orochi 100 km Marathon	100,00	×1
✓ 38	28/5/2006	13th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 39	26/6/2005	Open Race at IAU 100km WC Yubetsu (20. Lake Saroma 100 km Ultramarathon)	100,00	×1
✓ 40	29/5/2005	12th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 41	17/10/2004	10th River Shimanto 100km	100,00	×1
✓ 42	20/6/2004	4th Nichinan Orochi 100 km Marathon	100,00	×1
✓ 43	30/5/2004	11th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 44	19/10/2003	9th River Shimanto 100km	100,00	×1
✓ 45	25/5/2003	10th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 46	26/5/2002	9th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 47	27/5/2001	8th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 48	28/5/2000	7th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 49	29/9/2019	22th Muraoka 88 km Ultra Marathon	88,00	×1
✓ 50	24/9/2017	20th Muraoka 88 km Ultra Marathon	88,00	×1
✓ 51	25/9/2016	19th Muraoka 88 km Ultra Marathon	88,00	×1
✓ 52	28/9/2014	17th Muraoka 66 km Ultra Marathon	66,00	×1
✓ 53	29/9/2013	16th Muraoka 66 km Ultra Marathon	66,00	×1
✓ 54	28/9/2025	28th Muraoka 64 km Ultra Marathon	64,00	×1
✓ 55	19/10/2025	31th River Shimanto 60km	60,00	×1
✓ 56	15/10/2023	29th River Shimanto 60km	60,00	×1
57	29/9/2022	25th Muraoka 45 km Ultra Marathon	45,00	—