Eriko (小林恵理子) Kobayashi
ID 344972
Born : 1968 Cat. W55 Ultrarunner since 2012 JPN
43
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
54
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
59,2%
Rank quotient ?This runner's calculation uses 43 eligible race(s): Σ(rank − 1) = 16 546; Σ finishers = 27 970. 16 546 / 27 970 × 100 = 59.16%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed43
Km — ultra races4 193 km
> 100 km16
> 160 km13
Longest race170,3 km
4th Ultra-Trail Mt. Fuji (UTMF) — 25/9/2015

Km per year (ultra races)

299
3 races
2022
510
4 races
2023
632
5 races
2024
566
4 races
2025
167
1 race
2026

Race types (share of distance)

Road4,9%
Trail95,1%

Records

50 km8h14'52100 km12h33'3350 mi15h57'48100 mi26h40'49

HISTORY

43 race(s)
DateRacePerf.Rk
2026
24.04 167km JPN11th Ultra-Trail Mt. Fuji 44:50:08 h1386
2025
12.10 71.5km JPN33th Hasetsune Cup - Japan Mountain Endurance Race 22:17:23 h1116
13.09 162.2km JPN17th Shinetsu Five Mountains Trail 100 mile 32:15:59 h235
27.06 165km JPN4th Deep Japan Ultra 100 - 165 km 44:19:41 h39
25.04 167km JPN10th Ultra-Trail Mt. Fuji 44:21:35 h1435
2024
13.10 71.5km JPN32th Hasetsune Cup - Japan Mountain Endurance Race 21:22:14 h1306
14.09 163.1km JPN16th Shinetsu Five Mountains Trail 100 mile 26:40:49 h109
14.07 65km JPN15th Nozawa Onsen 4100D Mountain Trail Pair 14:37:12 h21
21.06 165km JPN3rd Deep Japan Ultra 100 - 165 km 43:33:49 h46
26.04 167km JPN9th Ultra-Trail Mt. Fuji 44:42:57 h1334
2023
08.10 71.5km JPN31th Hasetsune Cup - Japan Mountain Endurance Race 20:43:45 h1270
16.09 162.6km JPN15th Shinetsu Five Mountains Trail 100 mile 32:24:41 h199
16.07 109.2km JPN15th OSJ Ontake 100km Ultra Trail 19:20:33 h613
21.04 167km JPN8th Ultra-Trail Mt. Fuji 39:43:08 h913
2022
09.10 71.5km JPN30th Hasetsune Cup - Japan Mountain Endurance Race 20:42:37 h970
17.09 162.6km JPN14th Shinetsu Five Mountains Trail 100 mile 31:45:37 h133
17.07 65km JPN13th Nozawa Onsen 4100D Mountain Trail Pair 15:31:11 h17
2019
14.09 100mi JPN11th Shinetsu Five Mountains Trail 100 mile 31:21:39 h189
01.06 59km JPN11th OSJ Okukuji Trail 60k 11:59:07 h160
24.03 100km JPN1st Ibaraki 100k Ultra Marathon 12:33:33 h321
2018
07.10 71.5km JPN26th Hasetsune Cup - Japan Mountain Endurance Race 16:32:12 h520
14.07 65km JPN9th Nozawa Onsen 4100D Mountain Trail Pair 16:04:20 h11
27.04 170km JPN5th Ultra-Trail Mt. Fuji 39:27:35 h372
2017
23.09 129km JPN4th SkyView Ultra-Trail 120 - Yamada Noboru Memorial Cup 26:45:20 h137
10.09 50km JPN10th OSJ Adatara Trail 50K 11:55:29 h55
29.07 102km JPN1st OSJ Itamuro 100 23:40:44 h91
15.07 65km JPN8th Nozawa Onsen 4100D Mountain Trail Pair 14:16:02 h9
27.05 50km JPN9th OSJ Okukuji Trail 50k 12:21:44 h199
2016
11.09 53km JPN6th Hakuba Int. Trail Run 7:29:22 h132
02.07 80km JPN6th Utsukushigahara 80 km Trail Run 15:57:48 h512
28.05 50km JPN8th OSJ Okukuji Trail 50k 12:54:44 h235
2015
31.10 71.5km JPN23rd Hasetsune Cup - Japan Mountain Endurance Race 13:33:45 h606
25.09 170.3km JPN4th Ultra-Trail Mt. Fuji 37:13:17 h212
13.09 53km JPN5th Hakuba Int. Trail Run 7:02:55 h118
30.05 50km JPN7th OSJ Okukuji Trail 50k 12:40:15 h203
2014
09.11 50km JPN6th Kanna Mountain Run 8:14:52 h37
12.10 71.5km JPN22nd Hasetsune Cup - Japan Mountain Endurance Race 13:58:01 h657
14.09 53km JPN4th Hakuba Int. Trail Run 7:27:32 h111
26.04 88km JPN3rd Shizuoka to Yamanashi 19:55:53 h250
06.04 52km JPN65. Tsurunuma 52 km 5:44:17 h19
2013
15.09 53km JPN3rd Hakuba Int. Trail Run 6:58:00 h104
02.06 50km JPN5th OSJ Okukuji Trail 50k 12:00:35 h137
2012
02.09 52km JPN62. Tsurunuma 52 km 5:38:29 h50