Masahito (辻雅仁) Tsuji
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Born : 1979
Cat. M45 Ultrarunner since 2018
16
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
35
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 ?Japan
Japan25,4%
Rank quotient ?This runner's calculation uses 16 eligible race(s): Σ(rank − 1) = 2 856; Σ finishers = 11 247. 2 856 / 11 247 × 100 = 25.39%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed16
Km — ultra races1 570 km
> 100 km6
> 160 km4
Longest race169,0 km
5th Lake Biwa 100 — 10/10/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road13,9%
Trail86,1%
HISTORY
16 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2025 | ||||
| 10.10 | 169km | 5th Lake Biwa 100 |
2d 00:06:56 h | 177 |
| 2024 | ||||
| 11.10 | 169km | 4th Lake Biwa 100 |
2d 00:07:39 h | 175 |
| 26.05 | 62km | 16th OSJ Okukuji Trail 60k |
12:05:19 h | 129 |
| 21.04 | 118km | 34th Fuji 5 Lakes 118 km Challenge |
14:19:15 h | 240 |
| 2023 | ||||
| 10.12 | 70km | 10th Izu Trail Journey |
10:24:27 h | 355 |
| 03.09 | 53.4km | 16th OSJ Adatara Trail 50K |
12:47:40 h | 112 |
| 06.08 | 50km | 1st Mount Akagi Trail Running Race |
8:15:01 h | 40 |
| 21.04 | 167km | 8th Ultra-Trail Mt. Fuji |
32:28:00 h | 320 |
| 2022 | ||||
| 16.07 | 106.5km | 14th OSJ Ontake 100km Ultra Trail |
13:37:18 h | 130 |
| 22.04 | 167km | 7th Ultra-Trail Mt. Fuji |
30:42:29 h | 298 |
| 2021 | ||||
| 12.12 | 69.1km | 8th Izu Trail Journey |
8:41:39 h | 117 |
| 2020 | ||||
| 13.12 | 66km | 7th Izu Trail Journey |
8:21:33 h | 111 |
| 2019 | ||||
| 27.10 | 73km | 10th OSJ Hyonosen Mountains Trail Race |
12:02:23 h | 55 |
| 15.09 | 100km | 19th Tango 100 km Ultramarathon |
11:51:09 h | 252 |
| 22.06 | 80km | 5th OSJ Yamanaka Onsen Trail Run |
14:26:28 h | 66 |
| 2018 | ||||
| 12.05 | 50km | 4th Mt. Hiei Int. 50 km Trail Run |
9:39:38 h | 295 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 10/10/2025 | 5th Lake Biwa 100 | 169,00 | ×4 |
| ✓ 2 | 11/10/2024 | 4th Lake Biwa 100 | 169,00 | ×4 |
| ✓ 3 | 21/4/2023 | 8th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×4 |
| ✓ 4 | 22/4/2022 | 7th Ultra-Trail Mt. Fuji (UTMF) | 167,00 | ×4 |
| ✓ 5 | 21/4/2024 | 34th Fuji 5 Lakes 118 km Challenge | 118,00 | ×3 |
| ✓ 6 | 16/7/2022 | 14th OSJ Ontake 100km Ultra Trail | 106,50 | ×3 |
| ✓ 7 | 15/9/2019 | 19th Tango 100 km Ultramarathon | 100,00 | ×2 |
| ✓ 8 | 22/6/2019 | 5th OSJ Yamanaka Onsen Trail Run | 80,00 | ×2 |
| ✓ 9 | 27/10/2019 | 10th OSJ Hyonosen Mountains Trail Race | 73,00 | ×2 |
| ✓ 10 | 10/12/2023 | 10th Izu Trail Journey | 70,00 | ×2 |
| ✓ 11 | 12/12/2021 | 8th Izu Trail Journey | 69,10 | ×1 |
| ✓ 12 | 13/12/2020 | 7th Izu Trail Journey | 66,00 | ×1 |
| ✓ 13 | 26/5/2024 | 16th OSJ Okukuji Trail 60k | 62,00 | ×1 |
| ✓ 14 | 3/9/2023 | 16th OSJ Adatara Trail 50K | 53,40 | ×1 |
| ✓ 15 | 6/8/2023 | 1st Mount Akagi Trail Running Race | 50,00 | ×1 |
| ✓ 16 | 12/5/2018 | 4th Mt. Hiei Int. 50 km Trail Run | 50,00 | ×1 |