Nobuyuki (猶原信幸) Naohara

Born : 1951 Cat. M75 Ultrarunner since 2002

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

49,8%

Rank quotient ?This runner's calculation uses 86 eligible race(s): Σ(rank − 1) = 23 901; Σ finishers = 47 957. 23 901 / 47 957 × 100 = 49.84%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed87

Km — ultra races12 050 km

> 100 km37

> 160 km28

> 200 km20

> 24h5

Longest race320,0 km

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

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road92,3%

Trail6,6%

Stage1,1%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M1

Longest winning streak0

Current streak0

Records

50 km10h26'07 100 km9h57'01 24 h196,10 km

HISTORY

86 race(s)

Date		Race	Perf.	Rk
2020
12.01	100km	5th Yakushima Ultramarathon 100 km	14:41:44 h	134
2019
01.11	320km	Tachibana Bay Coast 320 Ultra Marathon	2d 07:45:45 h	8
19.10	51.4km	10th Inagawa 100km Ultra-Marathon	6:08:25 h	175
14.09	251km	2nd Utsukushima Fukushima Journey Run 250K	46:38:56 h	50
13.07	263km	4th Michinoku Tsugaru Journey Run 263K	47:49:39 h	61
30.06	100km	34. Lake Saroma 100 km Ultramarathon	12:49:06 h	2090
02.06	100km	2nd Nanto 100 km Ultramarathon	13:45:55 h	200
04.05	217km	13th Nagasaki Tachibana Gulf Coast Super Maranic 217	34:35:56 h	25
21.04	100km	11th 100 km Ultra Maranic Osaka	13:16:18 h	297
13.04	102km	5th Okuizumo Ultra Orochi 100km Tooashi	13:35:57 h	233
23.02	204km	9th Little Edo Oedo 200k	34:51:09 h	194
13.01	100km	4th Yakushima Ultramarathon	14:04:22 h	79
2018
21.10	100km	24th River Shimanto 100km	13:50:24 h	1243
14.07	263km	3rd Michinoku Tsugaru Journey Run 263K	2d 01:40:11 h	67
24.06	100km	33. Lake Saroma 100 km Ultramarathon	12:53:43 h	2220
17.06	100km	13. Okinoshima 100km Ultra Marathon	13:01:48 h	199
27.05	100km	25th Ebisu-Daikoku 100 km Marathon	13:56:00 h	357
14.04	102km	4th Okuizumo Ultra Orochi 100km Tooashi	14:06:13 h	218
03.03	204km	8th Little Edo Oedo 200k	35:40:23 h	233
14.01	100km	3rd Yakushima Ultramarathon	14:33:52 h	55
2017
02.11	276km	Tachibana Bay Coast 273 Ultra Marathon	2d 01:54:03 h	31
02.09	115km	1st Miyagi Yumeguri Ultra Marathon - 115 km	14:40:34 h	70
04.05	173km	11th Nagasaki Tachibana Gulf Coast Super Maranic 173	26:54:53 h	34
2016
16.10	100km	22nd River Shimanto 100km	12:08:32 h	521
26.06	100km	31. Lake Saroma 100 km Ultramarathon	12:26:17 h	1903
05.03	204km	6th Little Edo Oedo 200k	35:47:47 h	202
2015
18.10	100km	21st River Shimanto 100km	10:51:45 h	230
04.10	70km	2nd Naeba-Sanroku Geopark Tsunan Ultramarathon 70K	8:26:58 h	19
27.09	100km	25. Akita Nairiku 100km Marathon	12:17:53 h	425
06.09	49.6km	4th Trainic world Ogose-Tokigawa Trail Run 50km	10:26:07 h	322
28.06	100km	30. Lake Saroma 100 km Ultramarathon	11:41:12 h	1299
22.06	77km	22. Ultramarathon Okumusashi	9:12:51 h	587
31.05	100km	22nd Ebisu-Daikoku 100 km Marathon	11:31:09 h	142
17.05	77km	Saba Highway Ultramarathon	11:09:45 h	379
04.05	173km	9th Nagasaki Tachibana Gulf Coast Super Maranic 173	24:42:47 h	23
26.04	100km	7th 100 km Ultra Maranic Osaka	11:59:00 h	107
29.03	100km	1st Osaka Yodogawa 100 km Ultra Marathon	11:58:21 h	278
28.02	203km	5th Little Edo Oedo 200k	32:35:44 h	103
2014
22.11	103km	Tachibana Bay Coast 100 Ultra Marathon	13:09:46 h	33
05.10	102km	3rd Noto Peninsula 100 km Ultra Marathon	12:23:44 h	81
28.09	100km	17th Muraoka 100 km Ultra Marathon	12:33:19 h	184
14.09	88km	5th Akiota Yajirushi Marathon 88km	11:27:01 h	179
25.05	100km	21st Ebisu-Daikoku 100 km Marathon	13:13:11 h	216
04.05	173km	8th Nagasaki Tachibana Gulf Coast Super Maranic 173	28:50:28 h	49
2013
20.10	100km	2nd Noto Peninsula 100 km Ultra Marathon	12:37:25 h	159
29.09	100km	16th Muraoka 100 km Ultra Marathon	12:38:12 h	91
15.09	88km	4th Akiota Yajirushi Marathon 88km	10:46:51 h	172
30.06	100km road race	28. Lake Saroma 100 km Ultramarathon	12:12:39 h	1273
12.04	198km	13th Taiyou No Michi 200km	37:42:00 h	3 🥉
02.03	203km	3rd Little Edo Oedo 200k	33:51:50 h	90
2012
21.10	100km	1st Noto Peninsula 100 km Ultra Marathon	12:09:52 h	100
30.09	100km	15th Muraoka 100 km Ultra Marathon	13:04:45 h	156
24.06	100km road race	27. Lake Saroma 100 km Ultramarathon	11:44:29 h	1132
02.05	250km	24. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	43:21:57 h	62
2011
16.10	100km	17th River Shimanto 100km	12:04:46 h	421
2007
02.11	320km	4th Kansai Yumeikido Road Super Run 320 km	2d 07:12:00 h	8
14.10	100km	13th River Shimanto 100km	13:37:04 h	901
22.09	100km	17. Akita Nairiku 100km Marathon	10:53:07 h	203
24.06	100km	22. Lake Saroma 100 km Ultramarathon	10:21:47 h	407
02.06	24h	5th Akiruno 24 Hour Race Japan Cup	179.797 km	10
02.05	250km	19. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	36:39:56 h	6
21.04	250km	14. Sakura Michi Kokusai Nature Run	32:03:00 h	27
07.04	70km	2nd Toda Saiko 70 km	6:34:04 h	23
01.04	100km	51. Tsurunuma 100 km	10:19:33 h	13
2006
03.11	320km	3rd Kansai Yumeikido Road Super Run 320 km	2d 06:33:00 h	5
15.10	100km	12th River Shimanto 100km	11:06:07 h	242
17.09	141km	9th Karisakatoge beyond Chichibu Run	21:17:48 h	22
25.06	100km	21. Lake Saroma 100 km Ultramarathon	10:26:56 h	341
17.06	106km	10th Kamoshika Mountain Village Tour	19:27:49 h	7
03.06	24h	4th Akiruno 24 Hour Race Japan Cup	164.940 km	20
02.05	250km	18. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	38:09:26 h	10
22.04	250km	13. Sakura Michi Kokusai Nature Run	35:08:00 h	48
02.04	100km	49. Tsurunuma 100 km	9:57:01 h	14
2005
16.10	100km	11th River Shimanto 100km	10:46:34 h	204
07.08	75km	12. Ultramarathon Okumusashi	8:14:48 h	113
26.06	100km	Open Race at IAU 100km WC Yubetsu (20. Lake Saroma 100 km Ultramarathon)	11:19:57 h	666
11.06	24h	3rd Akiruno 24 Hour Race Japan Cup	141.060 km	22
02.05	250km	17. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	38:15:37 h	14
2004
17.10	100km	10th River Shimanto 100km	10:42:14 h	216
10.10	71.5km	12th Hasetsune Cup - Japan Mountain Endurance Race	21:28:37 h	759
24.07	132km/2stages	Yashagaike Legend Maranic 132 km	14:31:25 h	17
12.06	24h	2nd Akiruno 24 Hour Race Japan Cup	196.097 km	9
02.05	250km	16. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	39:17:51 h	11
2003
05.07	24h	1st Akiruno 24 Hour Race Japan Cup	160.741 km	11
2002
12.10	71.5km	10th Hasetsune Cup - Japan Mountain Endurance Race	18:19:27 h	386
12.05	100km	8th Yatsugatake Nobeyama 100 km	10:17:37 h	38

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	×3
✓ 2	2/11/2007	4th Kansai Yumeikido Road Super Run 320 km	320,00	×3
✓ 3	3/11/2006	3rd Kansai Yumeikido Road Super Run 320 km	320,00	×3
✓ 4	2/11/2017	Tachibana Bay Coast 273 Ultra Marathon	276,00	×2
✓ 5	13/7/2019	4th Michinoku Tsugaru Journey Run 263K	263,00	×2
✓ 6	14/7/2018	3rd Michinoku Tsugaru Journey Run 263K	263,00	×2
✓ 7	14/9/2019	2nd Utsukushima Fukushima Journey Run 250K	251,00	×2
✓ 8	2/5/2012	24. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	250,00	×2
✓ 9	2/5/2007	19. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	250,00	×2
✓ 10	21/4/2007	14. Sakura Michi Kokusai Nature Run	250,00	×2
✓ 11	2/5/2006	18. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	250,00	×2
✓ 12	22/4/2006	13. Sakura Michi Kokusai Nature Run	250,00	×2
✓ 13	2/5/2005	17. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	250,00	×2
✓ 14	2/5/2004	16. Yamaguchi 100 Hagi-O-Kan Maranic 250 km	250,00	×2
✓ 15	4/5/2019	13th Nagasaki Tachibana Gulf Coast Super Maranic 217	217,00	×2
✓ 16	23/2/2019	9th Little Edo Oedo 200k	204,00	×2
✓ 17	3/3/2018	8th Little Edo Oedo 200k	204,00	×2
✓ 18	5/3/2016	6th Little Edo Oedo 200k	204,00	×2
✓ 19	28/2/2015	5th Little Edo Oedo 200k	203,00	×2
✓ 20	2/3/2013	3rd Little Edo Oedo 200k	203,00	×2
✓ 21	12/4/2013	13th Taiyou No Michi 200km	198,00	×2
✓ 22	12/6/2004	2nd Akiruno 24 Hour Race Japan Cup	196,10	×1
✓ 23	2/6/2007	5th Akiruno 24 Hour Race Japan Cup	179,80	×1
✓ 24	4/5/2017	11th Nagasaki Tachibana Gulf Coast Super Maranic 173	173,00	×1
✓ 25	4/5/2015	9th Nagasaki Tachibana Gulf Coast Super Maranic 173	173,00	×1
✓ 26	4/5/2014	8th Nagasaki Tachibana Gulf Coast Super Maranic 173	173,00	×1
✓ 27	3/6/2006	4th Akiruno 24 Hour Race Japan Cup	164,94	×1
✓ 28	5/7/2003	1st Akiruno 24 Hour Race Japan Cup	160,74	×1
✓ 29	11/6/2005	3rd Akiruno 24 Hour Race Japan Cup	141,06	×1
✓ 30	17/9/2006	9th Karisakatoge beyond Chichibu Run	141,00	×1
✓ 31	24/7/2004	Yashagaike Legend Maranic 132 km	132,00	×1
✓ 32	2/9/2017	1st Miyagi Yumeguri Ultra Marathon - 115 km	115,00	×1
✓ 33	17/6/2006	10th Kamoshika Mountain Village Tour	106,00	×1
✓ 34	22/11/2014	Tachibana Bay Coast 100 Ultra Marathon	103,00	×1
✓ 35	13/4/2019	5th Okuizumo Ultra Orochi 100km Tooashi	102,00	×1
✓ 36	14/4/2018	4th Okuizumo Ultra Orochi 100km Tooashi	102,00	×1
✓ 37	5/10/2014	3rd Noto Peninsula 100 km Ultra Marathon	102,00	×1
✓ 38	12/1/2020	5th Yakushima Ultramarathon 100 km	100,00	×1
✓ 39	30/6/2019	34. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 40	2/6/2019	2nd Nanto 100 km Ultramarathon	100,00	×1
✓ 41	21/4/2019	11th 100 km Ultra Maranic Osaka	100,00	×1
✓ 42	13/1/2019	4th Yakushima Ultramarathon	100,00	×1
✓ 43	21/10/2018	24th River Shimanto 100km	100,00	×1
✓ 44	24/6/2018	33. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 45	17/6/2018	13. Okinoshima 100km Ultra Marathon	100,00	×1
✓ 46	27/5/2018	25th Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 47	14/1/2018	3rd Yakushima Ultramarathon	100,00	×1
✓ 48	16/10/2016	22nd River Shimanto 100km	100,00	×1
✓ 49	26/6/2016	31. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 50	18/10/2015	21st River Shimanto 100km	100,00	×1
✓ 51	27/9/2015	25. Akita Nairiku 100km Marathon	100,00	×1
✓ 52	28/6/2015	30. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 53	31/5/2015	22nd Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 54	26/4/2015	7th 100 km Ultra Maranic Osaka	100,00	×1
✓ 55	29/3/2015	1st Osaka Yodogawa 100 km Ultra Marathon	100,00	×1
✓ 56	28/9/2014	17th Muraoka 100 km Ultra Marathon	100,00	×1
✓ 57	25/5/2014	21st Ebisu-Daikoku 100 km Marathon	100,00	×1
✓ 58	20/10/2013	2nd Noto Peninsula 100 km Ultra Marathon	100,00	×1
✓ 59	29/9/2013	16th Muraoka 100 km Ultra Marathon	100,00	×1
✓ 60	30/6/2013	28. Lake Saroma 100 km Ultramarathon (JPN)	100,00	×1
✓ 61	21/10/2012	1st Noto Peninsula 100 km Ultra Marathon	100,00	×1
✓ 62	30/9/2012	15th Muraoka 100 km Ultra Marathon	100,00	×1
✓ 63	24/6/2012	27. Lake Saroma 100 km Ultramarathon (JPN)	100,00	×1
✓ 64	16/10/2011	17th River Shimanto 100km	100,00	×1
✓ 65	14/10/2007	13th River Shimanto 100km	100,00	×1
✓ 66	22/9/2007	17. Akita Nairiku 100km Marathon	100,00	×1
✓ 67	24/6/2007	22. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 68	1/4/2007	51. Tsurunuma 100 km	100,00	×1
✓ 69	15/10/2006	12th River Shimanto 100km	100,00	×1
✓ 70	25/6/2006	21. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 71	2/4/2006	49. Tsurunuma 100 km	100,00	×1
✓ 72	16/10/2005	11th River Shimanto 100km	100,00	×1
✓ 73	26/6/2005	Open Race at IAU 100km WC Yubetsu (20. Lake Saroma 100 km Ultramarathon)	100,00	×1
✓ 74	17/10/2004	10th River Shimanto 100km	100,00	×1
✓ 75	12/5/2002	8th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 76	14/9/2014	5th Akiota Yajirushi Marathon 88km	88,00	—
✓ 77	15/9/2013	4th Akiota Yajirushi Marathon 88km	88,00	—
78	22/6/2015	22. Ultramarathon Okumusashi	77,00	—
79	17/5/2015	Saba Highway Ultramarathon	77,00	—
80	7/8/2005	12. Ultramarathon Okumusashi	75,00	—
81	10/10/2004	12th Hasetsune Cup - Japan Mountain Endurance Race	71,50	—
82	12/10/2002	10th Hasetsune Cup - Japan Mountain Endurance Race	71,50	—
83	4/10/2015	2nd Naeba-Sanroku Geopark Tsunan Ultramarathon 70K	70,00	—
84	7/4/2007	2nd Toda Saiko 70 km	70,00	—
85	19/10/2019	10th Inagawa 100km Ultra-Marathon	51,40	—
86	6/9/2015	4th Trainic world Ogose-Tokigawa Trail Run 50km	49,60	—