Jun (塚田淳) Tsukada

Born : 1969 Cat. M55 Ultrarunner since 2008

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

31,8%

Rank quotient ?This runner's calculation uses 59 eligible race(s): Σ(rank − 1) = 10 674; Σ finishers = 33 600. 10 674 / 33 600 × 100 = 31.77%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed59

Km — ultra races5 701 km

> 100 km18

> 160 km7

Longest race200,0 km

16th Little Edo Oedo 200k — 14/3/2026

Km per year (ultra races)

559

2022

593

2023

405

2024

783

2025

360

2026

Race types (share of distance)

Road26,1%

Trail73,9%

Records

50 km8h04'05 100 km9h53'19 50 mi13h31'18 100 mi31h33'13

HISTORY

59 race(s)

Date		Race	Perf.	Rk
2026
22.05	160km	5th Tokyo Grand Trail - 100mi	45:31:19 h	71
14.03	200km	16th Little Edo Oedo 200k	29:47:04 h	64
2025
15.11	100km	11th FunTrails100K Round	25:29:29 h	147
04.10	151km	2nd Noto Country Journey Run	22:16:47 h	32
20.07	65km	16th Nozawa Onsen 4100D Mountain Trail	12:21:38 h	84
05.07	100km	3rd Shiga Kogen 100	20:37:33 h	99
25.04	167km	10th Ultra-Trail Mt. Fuji	39:12:18 h	669
15.03	200km	15th Little Edo Oedo 200k	32:03:41 h	74
2024
22.09	80km	10th SkyViewTrail Memorial Cup	13:31:18 h	42
14.07	65km	15th Nozawa Onsen 4100D Mountain Trail	9:41:01 h	33
06.07	100km	2nd Shiga Kogen 100	18:45:51 h	74
24.05	160km	3rd Tokyo Grand Trail - 100mi	47:26:06 h	83
2023
18.11	106km	9th FunTrails100K Round	24:04:49 h	134
07.10	100mi	9th OSJ Koumi 100	32:58:15 h	34
16.07	65km	14th Nozawa Onsen 4100D Mountain Trail	10:49:17 h	70
25.06	100km	38. Lake Saroma 100 km Ultramarathon	10:38:36 h	459
18.03	100mi	3rd Nagano Grand Circle	39:44:45 h	14
2022
20.11	106km	8th FunTrails100K Round	22:56:48 h	117
15.10	73km	7th Gasando Trail running race	10:39:24 h	52
17.07	65km	13th Nozawa Onsen 4100D Mountain Trail	11:02:02 h	98
25.06	48km	1st KTF Trail running race - Rockin Bear	7:11:33 h	103
22.05	100km	28th Yatsugatake Nobeyama 100 km	13:12:48 h	538
22.04	167km	7th Ultra-Trail Mt. Fuji	37:14:48 h	749
2021
20.11	106km	7th FunTrails100K Round	21:18:34 h	112
23.07	65km	12th Nozawa Onsen 4100D Mountain Trail	10:30:36 h	140
2020
22.02	115km	10th Oedo Night run 115k	16:36:23 h	37
2019
29.09	64km	6th Naeba-Sanroku Geopark Tsunan Ultramarathon 64K	7:20:37 h	5
14.09	100mi	11th Shinetsu Five Mountains Trail 100 mile	31:33:13 h	200
13.07	65km	10th Nozawa Onsen 4100D Mountain Trail	10:35:47 h	83
09.06	50km	12th Skyline Trail Sugadaira	8:10:18 h	123
2018
14.11	58km	3rd Myoko Ultra Run rAce 18	6:48:37 h	36
21.10	100km	7th Noto Peninsula 100 km Ultra Marathon	12:06:44 h	112
14.07	65km	9th Nozawa Onsen 4100D Mountain Trail	13:08:52 h	91
10.06	50km	11th Skyline Trail Sugadaira	8:33:48 h	109
20.05	100km	24th Yatsugatake Nobeyama 100 km	12:25:05 h	487
2017
16.09	102km	9th Shinetsu Five Mountains Trail 100 mile	18:52:33 h	233
15.07	65km	8th Nozawa Onsen 4100D Mountain Trail	11:28:00 h	105
10.06	45km	10th Skyline Trail Sugadaira	6:57:06 h	130
21.05	100km	23rd Yatsugatake Nobeyama 100 km	12:00:31 h	281
2016
09.10	100km	11th Echigo Kubikino 100km Ultramarathon	10:35:31 h	213
18.09	110km	8th Shinetsu Five Mountains Trail 110km	13:26:23 h	42
16.07	65km	7th Nozawa Onsen 4100D Mountain Trail	9:46:47 h	47
12.06	45.4km	9th Skyline Trail Sugadaira	7:23:19 h	158
22.05	100km	22nd Yatsugatake Nobeyama 100 km	11:28:17 h	258
2014
12.10	100km	10th Echigo Kubikino 100km Ultramarathon	9:53:19 h	124
14.09	110km	6th Shinetsu Five Mountains Trail 110km	15:17:21 h	52
30.08	63km	1st Shigakogen Extreme Trail	16:02:36 h	143
18.05	100km	20th Yatsugatake Nobeyama 100 km	11:31:30 h	229
2013
13.10	71.5km	21st Hasetsune Cup - Japan Mountain Endurance Race	15:22:21 h	804
31.08	70km	3rd Utsukushigahara 70 km Trail Run	12:24:15 h	94
2012
04.11	45km	4th Shinshu-Togakushi Trail Run Race	5:52:15 h	17
16.09	110km	4th Shinetsu Five Mountains Trail 110km	15:57:16 h	56
20.05	100km	18th Yatsugatake Nobeyama 100 km	11:01:26 h	134
2011
03.07	50km	3rd OSJ Shiga Kogen Trail 50K	8:04:05 h	58
2010
09.10	100km	8th Echigo Kubikino 100km Ultramarathon	11:51:52 h	392
04.07	50km	2nd OSJ Shiga Kogen Trail 50K	10:08:19 h	130
16.05	100km	16th Yatsugatake Nobeyama 100 km	12:34:59 h	420
2009
17.05	100km	15th Yatsugatake Nobeyama 100 km	13:34:15 h	559
2008
18.05	100km	14th Yatsugatake Nobeyama 100 km	13:53:57 h	679

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	14/3/2026	16th Little Edo Oedo 200k	200,00	×3
✓ 2	15/3/2025	15th Little Edo Oedo 200k	200,00	×3
✓ 3	25/4/2025	10th Ultra-Trail Mt. Fuji (UTMF)	167,00	×2
✓ 4	22/4/2022	7th Ultra-Trail Mt. Fuji (UTMF)	167,00	×2
✓ 5	7/10/2023	9th OSJ Koumi 100	160,93	×2
✓ 6	18/3/2023	3rd Nagano Grand Circle	160,93	×2
✓ 7	14/9/2019	11th Shinetsu Five Mountains Trail 100 mile	160,93	×2
✓ 8	22/5/2026	5th Tokyo Grand Trail - 100mi	160,00	×2
✓ 9	24/5/2024	3rd Tokyo Grand Trail - 100mi	160,00	×2
✓ 10	4/10/2025	2nd Noto Country Journey Run	151,00	×2
✓ 11	22/2/2020	10th Oedo Night run 115k	115,00	×1
✓ 12	18/9/2016	8th Shinetsu Five Mountains Trail 110km	110,00	×1
✓ 13	14/9/2014	6th Shinetsu Five Mountains Trail 110km	110,00	×1
✓ 14	16/9/2012	4th Shinetsu Five Mountains Trail 110km	110,00	×1
✓ 15	18/11/2023	9th FunTrails100K Round	106,00	×1
✓ 16	20/11/2022	8th FunTrails100K Round	106,00	×1
✓ 17	20/11/2021	7th FunTrails100K Round	106,00	×1
✓ 18	16/9/2017	9th Shinetsu Five Mountains Trail 100 mile	102,00	×1
✓ 19	15/11/2025	11th FunTrails100K Round	100,00	×1
✓ 20	5/7/2025	3rd Shiga Kogen 100	100,00	×1
✓ 21	6/7/2024	2nd Shiga Kogen 100	100,00	×1
✓ 22	25/6/2023	38. Lake Saroma 100 km Ultramarathon	100,00	×1
✓ 23	22/5/2022	28th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 24	21/10/2018	7th Noto Peninsula 100 km Ultra Marathon	100,00	×1
✓ 25	20/5/2018	24th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 26	21/5/2017	23rd Yatsugatake Nobeyama 100 km	100,00	×1
✓ 27	9/10/2016	11th Echigo Kubikino 100km Ultramarathon	100,00	×1
✓ 28	22/5/2016	22nd Yatsugatake Nobeyama 100 km	100,00	×1
✓ 29	12/10/2014	10th Echigo Kubikino 100km Ultramarathon	100,00	×1
✓ 30	18/5/2014	20th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 31	20/5/2012	18th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 32	9/10/2010	8th Echigo Kubikino 100km Ultramarathon	100,00	×1
✓ 33	16/5/2010	16th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 34	17/5/2009	15th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 35	18/5/2008	14th Yatsugatake Nobeyama 100 km	100,00	×1
✓ 36	22/9/2024	10th SkyViewTrail Memorial Cup	80,00	×1
✓ 37	15/10/2022	7th Gasando Trail running race	73,00	×1
✓ 38	13/10/2013	21st Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 39	31/8/2013	3rd Utsukushigahara 70 km Trail Run	70,00	×1
✓ 40	20/7/2025	16th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 41	14/7/2024	15th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 42	16/7/2023	14th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 43	17/7/2022	13th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 44	23/7/2021	12th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 45	13/7/2019	10th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 46	14/7/2018	9th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 47	15/7/2017	8th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 48	16/7/2016	7th Nozawa Onsen 4100D Mountain Trail	65,00	×1
✓ 49	29/9/2019	6th Naeba-Sanroku Geopark Tsunan Ultramarathon 64K	64,00	×1
✓ 50	30/8/2014	1st Shigakogen Extreme Trail	63,00	×1
✓ 51	14/11/2018	3rd Myoko Ultra Run rAce 18	58,00	—
52	9/6/2019	12th Skyline Trail Sugadaira	50,00	—
53	10/6/2018	11th Skyline Trail Sugadaira	50,00	—
54	3/7/2011	3rd OSJ Shiga Kogen Trail 50K	50,00	—
55	4/7/2010	2nd OSJ Shiga Kogen Trail 50K	50,00	—
56	25/6/2022	1st KTF Trail running race - Rockin Bear	48,00	—
57	12/6/2016	9th Skyline Trail Sugadaira	45,40	—
58	10/6/2017	10th Skyline Trail Sugadaira	45,00	—
59	4/11/2012	4th Shinshu-Togakushi Trail Run Race	45,00	—