Masato (片山正人) Katayama

Born : 1956 Cat. M70 Ultrarunner since 2007

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

51,4%

Rank quotient ?This runner's calculation uses 116 eligible race(s): Σ(rank − 1) = 26 084; Σ finishers = 50 716. 26 084 / 50 716 × 100 = 51.43%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed123

Km — ultra races11 826 km

> 100 km39

> 160 km11

> 200 km5

> 24h2

Longest race276,0 km

Tachibana Bay Coast 273 Ultra Marathon — 1/11/2019

Km per year (ultra races)

210

2022

233

2023

184

2024

171

2025

259

2026

Race types (share of distance)

Road78,3%

Trail16,7%

Stage5,0%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M1

Longest winning streak0

Current streak0

Records

50 km5h26'45 100 km11h44'49 50 mi13h01'19 100 mi25h18'08 6 h64,88 km 12 h105,07 km 24 h173,07 km

HISTORY

121 race(s) · 2 stage(s) nested

Date		Race	Perf.	Rk
2026
01.08	50km	2nd Chiba Ultra Marathon 50km Night Run	7:55:30 h	31
09.05	55km	6th Kimitsu Ultra Marathon	6:52:15 h	193
11.04	100km	5th Yagurazawa Round Trip Pre-Tournament	20:26:08 h	35
15.03	54km	14th Arakawa Riverside Journey - Stage 2	6:43:13 h	17
2025
19.10	70km	32. Ultramarathon Okumusashi	8:30:52 h	180
22.08	101km	12th World Cultural Heritage "Fuji" Foot Race	16:22:52 h	159
2024
20.10	70km	31. Ultramarathon Okumusashi	8:20:01 h	220
14.04	60km	9th Tamagawa Ultra Marathon - 60 km	7:37:58 h	46
17.03	54.2km	12th Arakawa Riverside Journey Stage Race - Stage 2	6:35:32 h	23
2023
18.08	101km	10th World Cultural Heritage "Fuji" Foot Race	16:15:02 h	117
04.06	78km	30. Ultramarathon Okumusashi	9:06:41 h	235
19.03	54.2km	11th Arakawa Riverside Journey Stage Race - Stage 2	6:36:50 h	27
2022
05.06	78km	29. Ultramarathon Okumusashi	8:48:42 h	281
24.04	50km	7th Tamagawa Ultra Marathon - 50 km	5:26:45 h	11
21.03	81.6km	10th Arakawa Riverside Journey Stage Race - Stage 1	11:50:00 h	74
2021
10.04	70km	16th Toda Saiko 70 km	7:01:38 h	171
03.04	80km	9th Arakawa Riverside Journey Stage Race - Stage 1	10:58:00 h	34
2020
24.10	146km	2nd Autumn leaves in Okumusashi / Chichibu Journey run	25:09:53 h	170
20.09	127km	3rd Utsukushima Fukushima Journey Run 127K	20:51:41 h	75
05.07	8h	26th 8-Hour Endurance Race Tokorozawa	73.500 km	62
21.03	136km/2stages	8th Arakawa Riverside Journey Stage Race	17:01:25 h	17
22.02	115km	10th Oedo Night run 115k	17:39:06 h	62
2019
01.11	276km	Tachibana Bay Coast 273 Ultra Marathon	2d 05:24:56 h	31
19.10	100km	4th Iki 100 km Ultra Marathon	12:35:00 h	128
22.09	100km	29. Akita Nairiku 100km Marathon	11:44:49 h	237
14.09	129km	2nd Utsukushima Fukushima Journey Run 129K	18:33:07 h	8
07.09	105km	3rd Miyagi Yumeguri Ultra Marathon - 105 km	13:25:05 h	3 🥉
25.08	48km	6th Tsukuba Renjyo 48 km Road & Trail Run	6:53:36 h	105
17.08	101km	7th World Cultural Heritage "Fuji" Foot Race	13:37:59 h	39
13.07	177km	4th Michinoku Tsugaru Journey Run 177K	28:52:37 h	22
23.06	55.9km	6. Spatrail - Shima to Kusatsu 56K	8:38:56 h	59
02.06	78km	26. Ultramarathon Okumusashi	8:41:07 h	377
25.05	103km	8th Tojinbo 103 km Ultramarathon	14:22:06 h	64
21.04	100km	11th 100 km Ultra Maranic Osaka	11:51:47 h	133
16–17.03	136km/2stages	7th Arakawa Riverside Journey Stage Race	17:07:21 h	31
16.03	80km	7th Arakawa Riverside Journey Stage Race - Stage 1	10:08:56 h	68
17.03	56km	7th Arakawa Riverside Journey Stage Race - Stage 2	6:58:25 h	27
23.02	113km	9th Oedo Night run 113k	17:04:56 h	53
2018
16.12	100km	3rd Okinawa 100km Ultramarathon	12:49:00 h	183
15.09	122km	1st Utsukushima Fukushima Journey Run 122K	18:59:10 h	26
01.09	105k	2nd Miyagi Yumeguri Ultra Marathon - 105 km	14:15:31 h	12
19.08	101km	6th World Cultural Heritage "Fuji" Foot Race	13:38:00 h	44
14.07	188km	3rd Michinoku Tsugaru Journey Run 188K	31:39:14 h	16
24.06	72.7km	5. Spatrail - Shima to Kusatsu	12:14:57 h	330
03.06	78km	25. Ultramarathon Okumusashi	9:13:19 h	410
26.05	160km	10th Biwako Tourism Ultramannic 160 km	25:18:08 h	4
14.04	70km	13th Toda Saiko 70 km	7:30:30 h	219
2017
17.12	68km	Coast to Coast 70k Trail Run	12:16:15 h	387
03.09	49.6km	6th Trainic world Ogose-Tokigawa Trail Run 50km	9:13:23 h	214
15.07	200km	2nd Michinoku Tsugaru Journey Run 200K	37:21:28 h	50
02.07	100km	1st Nikko 100km Ultramarathon	13:18:53 h	692
11.06	100km	13th Iwate Ginga 100km Marathon Challenge	12:44:15 h	651
04.06	78km	24. Ultramarathon Okumusashi	9:18:56 h	573
21.05	71km	23rd Yatsugatake Nobeyama 71 km	9:32:46 h	67
03.05	140km	29. Yamaguchi 100 Hagi-O-Kan Maranic 140 km	22:54:46 h	175
23.04	100km	27th Fuji 5 Lakes 100 km Challenge	12:56:54 h	794
04.03	91km	7th Little Edo 91km	13:02:46 h	45
2016
11.12	71.7km	3rd Izu Trail Journey	13:49:39 h	1203
09.10	100km	11th Echigo Kubikino 100km Ultramarathon	12:52:17 h	855
11.09	75km	3rd SkyView Ultra-Trail 60 - Yamada Noboru Memorial Cup	17:43:25 h	84
21.08	97km	4th World Cultural Heritage "Fuji" Foot Race	13:32:00 h	42
16.07	100km	9th OSJ Ontake 100km Ultra Trail	16:58:59 h	647
26.06	72.7km	3. Spatrail - Shima to Kusatsu	12:39:35 h	597
12.06	100km	5th Hida Takayama 100 km Ultramarathon	13:11:49 h	849
09.04	70km	11th Toda Saiko 70 km	6:48:13 h	69
05.03	113km	6th Oedo Night run 113k	17:30:31 h	52
2015
20.12	60km	Coast to Coast Boso - Odan 60k	10:09:08 h	126
20.11	276km	Tachibana Bay Coast 273 Ultra Marathon	2d 06:47:53 h	46
17.10	100km	6th Inagawa 100km Ultra-Marathon	12:48:55 h	45
04.10	50km	9th Madarao Forest Trails 50km	7:20:21 h	201
13.09	50km	8th OSJ Adatara Trail 50K	11:27:04 h	154
06.09	49.6km	4th Trainic world Ogose-Tokigawa Trail Run 50km	8:27:38 h	156
29.08	100km	KISO Great Traverse 100 km Ultra Marathon	13:09:45 h	151
28.06	72.7km	2. Spatrail - Shima to Kusatsu	12:00:54 h	328
04.05	173km	9th Nagasaki Tachibana Gulf Coast Super Maranic 173	27:48:57 h	65
15.03	72km	2nd Izu Trail Journey	12:39:40 h	682
2014
22.11	103km	Tachibana Bay Coast 100 Ultra Marathon	14:45:20 h	80
09.11	50km	6th Kanna Mountain Run	8:54:59 h	55
27.10	45km	6th Shinshu-Togakushi Trail Run Race	7:48:26 h	136
12.10	71.5km	22nd Hasetsune Cup - Japan Mountain Endurance Race	18:19:30 h	1450
14.09	142km	17th Karisakatoge beyond Chichibu Run	23:10:33 h	123
30.08	103km	2nd World Cultural Heritage "Fuji" Foot Race	12:18:00 h	8
27.07	77km	21. Ultramarathon Okumusashi	9:31:56 h	348
15.06	81.4km	1. Spatrail - Shima to Kusatsu	13:01:19 h	257
04.05	173km	8th Nagasaki Tachibana Gulf Coast Super Maranic 173	28:43:40 h	47
2013
10.11	50km	5th Kanna Mountain Run	8:21:33 h	50
13.10	71.5km	21st Hasetsune Cup - Japan Mountain Endurance Race	19:02:03 h	1563
15.09	142km	16th Karisakatoge beyond Chichibu Run	23:14:19 h	106
24.08	101km	1st World Cultural Heritage "Fuji" Foot Race	13:31:00 h	21
28.07	77km	20. Ultramarathon Okumusashi	8:47:51 h	363
13.07	100km	6th OSJ Ontake 100km Ultra Trail	14:29:11 h	220
03.05	255km	9th River Road Foot Race 255 km	2d 07:29:04 h	29
13.04	70km	8th Toda Saiko 70 km	7:21:45 h	102
2012
11.11	50km	4th Kanna Mountain Run	8:26:18 h	64
07.10	71.5km	20th Hasetsune Cup - Japan Mountain Endurance Race	18:29:27 h	1350
16.09	143km	15th Karisakatoge beyond Chichibu Run	22:16:50 h	56
02.09	52km	62. Tsurunuma 52 km	5:01:49 h	23
05.08	77km	19. Ultramarathon Okumusashi	9:05:24 h	328
15.07	100km	5th OSJ Ontake 100km Ultra Trail	13:48:16 h	280
16.06	6h	11. Tokyo Challenge 6 hours	64.880 km	19
03.05	255km	8th River Road Foot Race 255 km	2d 07:51:12 h	13
2011
09.10	71.5km	19th Hasetsune Cup - Japan Mountain Endurance Race	20:29:12 h	1378
25.09	100km	14th Jonaizaka 100 km Ultra Marathon	12:08:00 h	13
18.09	143km	14th Karisakatoge beyond Chichibu Run	23:10:16 h	77
20.08	12h	1st Toyota Stadium 12 Hour Race	71.682 km	17
07.08	77km	18. Ultramarathon Okumusashi	8:26:27 h	233
16.07	100km	60. Tsurunuma 100 km	15:11:07 h	35
11.06	24h	10. Tokyo Challenge 24 hours	173.065 km	15
2010
17.09	143km	12th Karisakatoge beyond Chichibu Run	23:19:48 h	73
29.08	52km	58. Tsurunuma 52 km	5:24:52 h	20
01.08	77km	17. Ultramarathon Okumusashi	9:34:35 h	379
19.06	24h	9. Tokyo Challenge 24 hours	151.800 km	18
30.04	265km	6th River Road Foot Race 265 km	2d 09:09:32 h	10
2009
11.10	71.5km	17th Hasetsune Cup - Japan Mountain Endurance Race	19:18:35 h	1308
19.09	143km	12th Karisakatoge beyond Chichibu Run	23:09:18 h	72
30.08	52km	56. Tsurunuma 52 km	4:45:01 h	22
02.08	75km	16. Ultramarathon Okumusashi	8:41:15 h	338
13.06	12h	8. Tokyo Challenge 12 hours	105.070 km	7
11.04	70km	4th Toda Saiko 70 km	8:00:31 h	95
2008
31.08	52km	54. Tsurunuma 52 km	5:05:01 h	23
03.08	75km	15. Ultramarathon Okumusashi	9:08:52 h	321
14.06	6h	7. Tokyo Challenge 6 hours	61.480 km	16
2007
26.08	52km	52. Tsurunuma 52 km	5:29:36 h	40

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	1/11/2019	Tachibana Bay Coast 273 Ultra Marathon	276,00	×3
✓ 2	20/11/2015	Tachibana Bay Coast 273 Ultra Marathon	276,00	×3
✓ 3	30/4/2010	6th River Road Foot Race 265 km	265,00	×3
✓ 4	3/5/2013	9th River Road Foot Race 255 km	255,00	×3
✓ 5	3/5/2012	8th River Road Foot Race 255 km	255,00	×3
✓ 6	15/7/2017	2nd Michinoku Tsugaru Journey Run 200K	200,00	×2
✓ 7	14/7/2018	3rd Michinoku Tsugaru Journey Run 188K	188,00	×2
✓ 8	13/7/2019	4th Michinoku Tsugaru Journey Run 177K	177,00	×2
✓ 9	11/6/2011	10. Tokyo Challenge 24 hours	173,07	×2
✓ 10	4/5/2015	9th Nagasaki Tachibana Gulf Coast Super Maranic 173	173,00	×2
✓ 11	4/5/2014	8th Nagasaki Tachibana Gulf Coast Super Maranic 173	173,00	×2
✓ 12	26/5/2018	10th Biwako Tourism Ultramannic 160 km	160,00	×2
✓ 13	19/6/2010	9. Tokyo Challenge 24 hours	151,80	×1
✓ 14	24/10/2020	2nd Autumn leaves in Okumusashi / Chichibu Journey run	146,00	×1
✓ 15	16/9/2012	15th Karisakatoge beyond Chichibu Run	143,00	×1
✓ 16	18/9/2011	14th Karisakatoge beyond Chichibu Run	143,00	×1
✓ 17	17/9/2010	12th Karisakatoge beyond Chichibu Run	143,00	×1
✓ 18	19/9/2009	12th Karisakatoge beyond Chichibu Run	143,00	×1
✓ 19	14/9/2014	17th Karisakatoge beyond Chichibu Run	142,00	×1
✓ 20	15/9/2013	16th Karisakatoge beyond Chichibu Run	142,00	×1
✓ 21	3/5/2017	29. Yamaguchi 100 Hagi-O-Kan Maranic 140 km	140,00	×1
✓ 22	21/3/2020	8th Arakawa Riverside Journey Stage Race	136,00	×1
✓ 23	16/3/2019	7th Arakawa Riverside Journey Stage Race	136,00	×1
✓ 24	14/9/2019	2nd Utsukushima Fukushima Journey Run 129K	129,00	×1
✓ 25	20/9/2020	3rd Utsukushima Fukushima Journey Run 127K	127,00	×1
✓ 26	15/9/2018	1st Utsukushima Fukushima Journey Run 122K	122,00	×1
✓ 27	22/2/2020	10th Oedo Night run 115k	115,00	×1
✓ 28	23/2/2019	9th Oedo Night run 113k	113,00	×1
✓ 29	5/3/2016	6th Oedo Night run 113k	113,00	×1
✓ 30	13/6/2009	8. Tokyo Challenge 12 hours	105,07	×1
✓ 31	7/9/2019	3rd Miyagi Yumeguri Ultra Marathon - 105 km	105,00	×1
✓ 32	25/5/2019	8th Tojinbo 103 km Ultramarathon	103,00	×1
✓ 33	22/11/2014	Tachibana Bay Coast 100 Ultra Marathon	103,00	×1
✓ 34	30/8/2014	2nd World Cultural Heritage "Fuji" Foot Race	103,00	×1
✓ 35	22/8/2025	12th World Cultural Heritage "Fuji" Foot Race	101,00	×1
✓ 36	18/8/2023	10th World Cultural Heritage "Fuji" Foot Race	101,00	×1
✓ 37	17/8/2019	7th World Cultural Heritage "Fuji" Foot Race	101,00	×1
✓ 38	19/8/2018	6th World Cultural Heritage "Fuji" Foot Race	101,00	×1
✓ 39	24/8/2013	1st World Cultural Heritage "Fuji" Foot Race	101,00	×1
✓ 40	11/4/2026	5th Yagurazawa Round Trip Pre-Tournament	100,00	×1
✓ 41	19/10/2019	4th Iki 100 km Ultra Marathon	100,00	×1
✓ 42	22/9/2019	29. Akita Nairiku 100km Marathon	100,00	×1
✓ 43	21/4/2019	11th 100 km Ultra Maranic Osaka	100,00	×1
✓ 44	16/12/2018	3rd Okinawa 100km Ultramarathon	100,00	×1
✓ 45	2/7/2017	1st Nikko 100km Ultramarathon	100,00	×1
✓ 46	11/6/2017	13th Iwate Ginga 100km Marathon Challenge	100,00	×1
✓ 47	23/4/2017	27th Fuji 5 Lakes 100 km Challenge	100,00	×1
✓ 48	9/10/2016	11th Echigo Kubikino 100km Ultramarathon	100,00	×1
✓ 49	16/7/2016	9th OSJ Ontake 100km Ultra Trail	100,00	×1
✓ 50	12/6/2016	5th Hida Takayama 100 km Ultramarathon	100,00	×1
✓ 51	17/10/2015	6th Inagawa 100km Ultra-Marathon	100,00	×1
✓ 52	29/8/2015	KISO Great Traverse 100 km Ultra Marathon	100,00	×1
✓ 53	13/7/2013	6th OSJ Ontake 100km Ultra Trail	100,00	×1
✓ 54	15/7/2012	5th OSJ Ontake 100km Ultra Trail	100,00	×1
✓ 55	25/9/2011	14th Jonaizaka 100 km Ultra Marathon	100,00	×1
✓ 56	16/7/2011	60. Tsurunuma 100 km	100,00	×1
✓ 57	21/8/2016	4th World Cultural Heritage "Fuji" Foot Race	97,00	×1
✓ 58	4/3/2017	7th Little Edo 91km	91,00	×1
✓ 59	15/6/2014	1. Spatrail - Shima to Kusatsu	81,40	×1
✓ 60	4/6/2023	30. Ultramarathon Okumusashi	78,00	×1
✓ 61	5/6/2022	29. Ultramarathon Okumusashi	78,00	×1
✓ 62	2/6/2019	26. Ultramarathon Okumusashi	78,00	×1
✓ 63	3/6/2018	25. Ultramarathon Okumusashi	78,00	×1
✓ 64	4/6/2017	24. Ultramarathon Okumusashi	78,00	×1
✓ 65	27/7/2014	21. Ultramarathon Okumusashi	77,00	—
✓ 66	28/7/2013	20. Ultramarathon Okumusashi	77,00	—
✓ 67	5/8/2012	19. Ultramarathon Okumusashi	77,00	—
✓ 68	7/8/2011	18. Ultramarathon Okumusashi	77,00	—
✓ 69	1/8/2010	17. Ultramarathon Okumusashi	77,00	—
✓ 70	11/9/2016	3rd SkyView Ultra-Trail 60 - Yamada Noboru Memorial Cup	75,00	—
✓ 71	2/8/2009	16. Ultramarathon Okumusashi	75,00	—
✓ 72	3/8/2008	15. Ultramarathon Okumusashi	75,00	—
✓ 73	5/7/2020	26th 8-Hour Endurance Race Tokorozawa	73,50	—
74	24/6/2018	5. Spatrail - Shima to Kusatsu	72,70	—
75	26/6/2016	3. Spatrail - Shima to Kusatsu	72,70	—
76	28/6/2015	2. Spatrail - Shima to Kusatsu	72,70	—
77	15/3/2015	2nd Izu Trail Journey	72,00	—
78	11/12/2016	3rd Izu Trail Journey	71,70	—
79	20/8/2011	1st Toyota Stadium 12 Hour Race	71,68	—
80	12/10/2014	22nd Hasetsune Cup - Japan Mountain Endurance Race	71,50	—
81	13/10/2013	21st Hasetsune Cup - Japan Mountain Endurance Race	71,50	—
82	7/10/2012	20th Hasetsune Cup - Japan Mountain Endurance Race	71,50	—
83	9/10/2011	19th Hasetsune Cup - Japan Mountain Endurance Race	71,50	—
84	11/10/2009	17th Hasetsune Cup - Japan Mountain Endurance Race	71,50	—
85	21/5/2017	23rd Yatsugatake Nobeyama 71 km	71,00	—
86	19/10/2025	32. Ultramarathon Okumusashi	70,00	—
87	20/10/2024	31. Ultramarathon Okumusashi	70,00	—
88	10/4/2021	16th Toda Saiko 70 km	70,00	—
89	14/4/2018	13th Toda Saiko 70 km	70,00	—
90	9/4/2016	11th Toda Saiko 70 km	70,00	—
91	13/4/2013	8th Toda Saiko 70 km	70,00	—
92	11/4/2009	4th Toda Saiko 70 km	70,00	—
93	17/12/2017	Coast to Coast 70k Trail Run	68,00	—
94	16/6/2012	11. Tokyo Challenge 6 hours	64,88	—
95	14/6/2008	7. Tokyo Challenge 6 hours	61,48	—
96	14/4/2024	9th Tamagawa Ultra Marathon - 60 km	60,00	—
97	20/12/2015	Coast to Coast Boso - Odan 60k	60,00	—
98	23/6/2019	6. Spatrail - Shima to Kusatsu 56K	55,90	—
99	9/5/2026	6th Kimitsu Ultra Marathon	55,00	—
100	2/9/2012	62. Tsurunuma 52 km	52,00	—
101	29/8/2010	58. Tsurunuma 52 km	52,00	—
102	30/8/2009	56. Tsurunuma 52 km	52,00	—
103	31/8/2008	54. Tsurunuma 52 km	52,00	—
104	26/8/2007	52. Tsurunuma 52 km	52,00	—
105	1/8/2026	2nd Chiba Ultra Marathon 50km Night Run	50,00	—
106	24/4/2022	7th Tamagawa Ultra Marathon - 50 km	50,00	—
107	4/10/2015	9th Madarao Forest Trails 50km	50,00	—
108	13/9/2015	8th OSJ Adatara Trail 50K	50,00	—
109	9/11/2014	6th Kanna Mountain Run	50,00	—
110	10/11/2013	5th Kanna Mountain Run	50,00	—
111	11/11/2012	4th Kanna Mountain Run	50,00	—
112	3/9/2017	6th Trainic world Ogose-Tokigawa Trail Run 50km	49,60	—
113	6/9/2015	4th Trainic world Ogose-Tokigawa Trail Run 50km	49,60	—
114	25/8/2019	6th Tsukuba Renjyo 48 km Road & Trail Run	48,00	—
115	27/10/2014	6th Shinshu-Togakushi Trail Run Race	45,00	—