Koji (増田浩二) Masuda
ID 221383
Born : 1967 Cat. M55 Ultrarunner since 2008 JPN
49
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
52
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
1
Countries visited ?JPNJapan
60,0%
Rank quotient ?This runner's calculation uses 49 eligible race(s): Σ(rank − 1) = 31 876; Σ finishers = 53 120. 31 876 / 53 120 × 100 = 60.01%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed49
Km — ultra races4 528 km
> 100 km6
Longest race118,0 km
1st Fuji 5 Lakes 118 km Autumn Challenge — 7/10/2019

Km per year (ultra races)

200
2 races
2022
309
3 races
2023
100
1 race
2024
2025
2026

Race types (share of distance)

Road73,5%
Trail26,5%

Records

50 km8h15'22100 km8h45'59

HISTORY

49 race(s)
DateRacePerf.Rk
2024
09.06 100km JPN12th Hida Takayama 100 km Ultramarathon 13:56:47 h1479
2023
15.10 100km JPN29th River Shimanto 100km 13:27:00 h787
16.07 109.2km JPN15th OSJ Ontake 100km Ultra Trail 19:01:36 h580
21.05 100km JPN29th Yatsugatake Nobeyama 100 km 13:57:39 h782
2022
12.06 100km JPN10th Hida Takayama 100 km Ultramarathon 13:28:04 h881
22.05 100km JPN1st Suo-Oshima Ultra Marathon - 100 km 15:46:00 h179
2021
03.10 64km JPN8th Naeba-Sanroku Geopark Tsunan Ultramarathon 64K 8:30:04 h52
2019
07.10 118km JPN1st Fuji 5 Lakes 118 km Autumn Challenge 14:39:45 h138
09.06 100km JPN8th Hida Takayama 100 km Ultramarathon 12:52:39 h1119
19.05 100km JPN25th Yatsugatake Nobeyama 100 km 13:42:20 h1250
2018
17.11 52km JPN4th FunTrails50K Two Lakes&Green line 10:15:13 h323
10.06 100km JPN7th Hida Takayama 100 km Ultramarathon 13:28:17 h1178
20.05 100km JPN24th Yatsugatake Nobeyama 100 km 13:42:45 h1250
2017
15.10 100km JPN23rd River Shimanto 100km 13:02:19 h831
08.10 71.5km JPN25th Hasetsune Cup - Japan Mountain Endurance Race 21:43:03 h1530
11.06 100km JPN6th Hida Takayama 100 km Ultramarathon 13:01:29 h961
04.06 78km JPN24. Ultramarathon Okumusashi 9:32:21 h659
21.05 100km JPN23rd Yatsugatake Nobeyama 100 km 13:50:50 h939
2016
16.10 100km JPN22nd River Shimanto 100km 11:46:29 h449
12.06 100km JPN5th Hida Takayama 100 km Ultramarathon 12:29:04 h564
22.05 100km JPN22nd Yatsugatake Nobeyama 100 km 13:15:47 h808
24.04 100km JPN26th Fuji 5 Lakes 100 km Challenge 12:03:35 h455
2015
21.11 104km JPN1st FunTrails100K Round 29:31:15 h310
31.10 71.5km JPN23rd Hasetsune Cup - Japan Mountain Endurance Race 17:52:52 h1433
18.10 100km JPN21st River Shimanto 100km 11:15:59 h282
18.07 100km JPN8th OSJ Ontake 100km Ultra Trail 14:48:03 h288
07.06 100km JPN4th Hida Takayama 100 km Ultramarathon 12:24:18 h482
06.06 100km JPN3rd Tokyo Shibamata 100 km 8:45:59 h23
17.05 100km JPN21st Yatsugatake Nobeyama 100 km 13:38:26 h1064
2014
19.10 100km JPN20th River Shimanto 100km 12:21:02 h553
27.07 77km JPN21. Ultramarathon Okumusashi 10:43:52 h664
08.06 100km JPN3rd Hida Takayama 100 km Ultramarathon 13:31:18 h800
18.05 100km JPN20th Yatsugatake Nobeyama 100 km 13:36:04 h877
20.04 108km JPN24th Fuji 5 Lakes 108 km Challenge 13:49:42 h465
2013
13.10 71.5km JPN21st Hasetsune Cup - Japan Mountain Endurance Race 19:43:29 h1680
28.07 77km JPN20. Ultramarathon Okumusashi 9:25:14 h532
09.06 100km JPN2nd Hida Takayama 100 km Ultramarathon 13:06:24 h530
01.06 100km JPN1st Tokyo Shibamata 100 km 9:22:16 h40
19.05 100km JPN19th Yatsugatake Nobeyama 100 km 13:57:39 h1249
10.03 72km JPN1st Izu Trail Journey 12:59:44 h920
2012
21.10 100km JPN18th River Shimanto 100km 12:32:17 h522
16.09 50km JPN2nd Hakuba Int. Trail Run 8:15:22 h150
05.08 77km JPN19. Ultramarathon Okumusashi 10:52:46 h802
22.04 112km JPN22nd Fuji 5 Lakes 112 km Challenge 13:41:31 h283
2011
16.10 100km JPN17th River Shimanto 100km 10:40:41 h179
07.08 77km JPN18. Ultramarathon Okumusashi 8:10:25 h187
30.04 112km JPN21st Fuji 5 Lakes 112 km Challenge 14:18:15 h358
2010
04.07 8h JPN16th 8-Hour Endurance Race Tokorozawa - 3 tai 55.182 km38
2008
06.07 8h JPN14th 8-Hour Endurance Race Tokorozawa 71.412 km20