Naoki (藤田直毅) Fujita

Born : 1986 Cat. M40 Ultrarunner since 2017

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 ?

Hong Kong

Italy

Japan

31,4%

Rank quotient ?This runner's calculation uses 18 eligible race(s): Σ(rank − 1) = 3 313; Σ finishers = 10 540. 3 313 / 10 540 × 100 = 31.43%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed18

Km — ultra races1 547 km

> 100 km5

> 160 km1

Longest race167,0 km

1st Lake Biwa 100 — 1/10/2021

Km per year (ultra races)

107

2022

100

2023

2024

158

2025

2026

Race types (share of distance)

Road12,9%

Trail87,1%

Wins & podiums (ultra)

🏆 Win1

🏆 Win M1

🏅 Top 31

🏅 Top 3 M1

Longest winning streak1

Current streak0

Records

50 km8h24'13 100 km10h25'44 50 mi14h24'20

HISTORY

18 race(s)

Date		Race	Perf.	Rk
2025
21.06	58km	1st Kaga Spa by UTMB - Kaga Spa Trail Endurance 50	9:14:12 h	84
09.03	100km	7th Ibaraki 100k Ultra Marathon	10:25:44 h	92
2023
08.07	100km	1st Shiga Kogen 100	18:08:41 h	59
2022
24.09	107km	1st Hiroshima Wangan Trail Run	21:06:52 h	63
2021
01.10	167km	1st Lake Biwa 100	2d 01:49:23 h	68
23.07	65km	12th Nozawa Onsen 4100D Mountain Trail Trio	9:30:59 h	1 🏆
2020
18.10	54km	7th Shigakogen Extreme Trail	9:08:39 h	108
2019
08.12	71.7km	6th Izu Trail Journey	8:45:02 h	142
30.08	101km	14ème Courmayeur-Champex-Chamonix	21:16:49 h	615
11.08	50km	1st OSJ Mahirusanchi Trail 50K	8:24:13 h	37
22.06	80km	5th OSJ Yamanaka Onsen Trail Run	14:24:20 h	63
01.03	100km	8th TransLantau 100 Ultra Trail	21:20:32 h	102
2018
16.09	110km	10th Shinetsu Five Mountains Trail 110km	20:08:20 h	171
30.06	80km	8th Utsukushigahara 80 km Trail Run	15:33:08 h	277
12.05	108.7km	2nd Aso Round Trail	24:30:26 h	190
2017
08.10	71.5km	25th Hasetsune Cup - Japan Mountain Endurance Race	14:42:16 h	518
25.06	72.7km	4. Spatrail - Shima to Kusatsu	11:28:15 h	319
13.05	50km	3rd Mt. Hiei Int. 50 km Trail Run	9:36:04 h	422

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	1/10/2021	1st Lake Biwa 100	167,00	×4
✓ 2	16/9/2018	10th Shinetsu Five Mountains Trail 110km	110,00	×3
✓ 3	12/5/2018	2nd Aso Round Trail	108,70	×3
✓ 4	24/9/2022	1st Hiroshima Wangan Trail Run	107,00	×3
✓ 5	30/8/2019	14ème Courmayeur-Champex-Chamonix (CCC)	101,00	×2
✓ 6	9/3/2025	7th Ibaraki 100k Ultra Marathon	100,00	×2
✓ 7	8/7/2023	1st Shiga Kogen 100	100,00	×2
✓ 8	1/3/2019	8th TransLantau 100 Ultra Trail	100,00	×2
✓ 9	22/6/2019	5th OSJ Yamanaka Onsen Trail Run	80,00	×2
✓ 10	30/6/2018	8th Utsukushigahara 80 km Trail Run	80,00	×2
✓ 11	25/6/2017	4. Spatrail - Shima to Kusatsu	72,70	×2
✓ 12	8/12/2019	6th Izu Trail Journey	71,70	×2
✓ 13	8/10/2017	25th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×2
✓ 14	23/7/2021	12th Nozawa Onsen 4100D Mountain Trail Trio	65,00	×1
✓ 15	21/6/2025	1st Kaga Spa by UTMB - Kaga Spa Trail Endurance 50	58,00	×1
✓ 16	18/10/2020	7th Shigakogen Extreme Trail	54,00	×1
✓ 17	11/8/2019	1st OSJ Mahirusanchi Trail 50K	50,00	×1
✓ 18	13/5/2017	3rd Mt. Hiei Int. 50 km Trail Run	50,00	×1