Kazuho (井筒一穂) Izutsu

Born : 1962 Cat. W60 Ultrarunner since 2004

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 ?

Belgium

Italy

Japan

Netherlands

11,1%

Rank quotient ?This runner's calculation uses 17 eligible race(s): Σ(rank − 1) = 798; Σ finishers = 7 158. 798 / 7 158 × 100 = 11.15%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed17

Km — ultra races1 402 km

Longest race100,0 km

3rd 100 km Ultra Maranic Osaka — 22/5/2011

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road89,9%

Trail10,1%

Wins & podiums (ultra)

🏆 Win1

🏆 Win F3

🏅 Top 31

🏅 Top 3 F6

Longest winning streak1

Current streak0

Records

100 km7h49'53

HISTORY

19 race(s) · 1 split(s) nested

Date		Race	Perf.	Rk
2015
20.09	60km	15th Tango 60 km Ultramarathon	5:28:43 h	61
2014
14.09	60km	14th Tango 60 km Ultramarathon	5:55:04 h	81
2013
15.09	60km	13th Tango 60 km Ultramarathon	4:53:24 h	28
2011
22.05	100km	3rd 100 km Ultra Maranic Osaka	10:21:00 h	48
2010
23.05	100km	2nd 100 km Ultra Maranic Osaka	12:12:00 h	109
2009
20.09	60km	9th Tango 60 km Ultramarathon	5:38:17 h	37
19.06	50mi	IAU 100km WC Torhout (30. Nacht van West-Vlaanderen) - 50mi split	6:53:33 h	98
19.06	100km	IAU 100km WC Torhout (30. Nacht van West-Vlaanderen)	8:54:44 h	89
2008
08.11	100km	IAU 100 km WC Tuscania (100 km degli Etruschi)	7:59:48 h	54
14.09	60km	8th Tango 60 km Ultramarathon	4:45:09 h	7
18.05	71km	14th Yatsugatake Nobeyama 71 km	6:02:37 h	8
27.04	60km	10. Okukumano 60 km Ultramarathon	5:26:28 h	1 🏆
2007
08.09	100km	IAU 100km WC (RUN Winschoten 100 km)	7:57:32 h	59
08.09	50km	32. RUN Winschoten 100 km - 50km Split	3:54:24 h	96
08.09	100km	32. RUN Winschoten 100 km	7:57:32 h	71
24.06	100km	22. Lake Saroma 100 km Ultramarathon	8:15:31 h	40
20.05	71km	13th Yatsugatake Nobeyama 71 km	7:26:23 h	31
2004
11.09	100km	29. IAU 100km WC Winschoten	7:49:53 h	46
11.09	50mi	29. IAU 100km WC Winschoten - 50mi split	6:59:24 h	45
27.06	100km	19. Lake Saroma 100 km Ultramarathon	8:14:44 h	45

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	22/5/2011	3rd 100 km Ultra Maranic Osaka	100,00	×3
✓ 2	23/5/2010	2nd 100 km Ultra Maranic Osaka	100,00	×3
✓ 3	19/6/2009	IAU 100km WC Torhout (30. Nacht van West-Vlaanderen)	100,00	×3
✓ 4	8/11/2008	IAU 100 km WC Tuscania (100 km degli Etruschi)	100,00	×3
✓ 5	8/9/2007	IAU 100km WC (RUN Winschoten 100 km)	100,00	×3
✓ 6	24/6/2007	22. Lake Saroma 100 km Ultramarathon	100,00	×3
✓ 7	11/9/2004	29. IAU 100km WC Winschoten	100,00	×3
✓ 8	27/6/2004	19. Lake Saroma 100 km Ultramarathon	100,00	×3
✓ 9	18/5/2008	14th Yatsugatake Nobeyama 71 km	71,00	×2
✓ 10	20/5/2007	13th Yatsugatake Nobeyama 71 km	71,00	×2
✓ 11	20/9/2015	15th Tango 60 km Ultramarathon	60,00	×1
✓ 12	14/9/2014	14th Tango 60 km Ultramarathon	60,00	×1
✓ 13	15/9/2013	13th Tango 60 km Ultramarathon	60,00	×1
✓ 14	20/9/2009	9th Tango 60 km Ultramarathon	60,00	×1
✓ 15	14/9/2008	8th Tango 60 km Ultramarathon	60,00	×1
✓ 16	27/4/2008	10. Okukumano 60 km Ultramarathon	60,00	×1