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All-time results of this event:
Round of the Boso Peninsula 300K
| Distance: | 300km, 280km, | More details of this race. |
| Ranking eligible: | No (2023-2025) | Multiple Finishers |
| 1 to 36 of 36 search results. |
| Rank | Performance | Date | Length | Name | Nat. | YOB | Rank | M/F | Rank M/F | Cat | Cat. Rank |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 43:03:18 h | 15.-17.07.2023 | 280km | Abe, Shinya | JPN | 1980 | 1 | M | 1 | M40 | 1 |
| 2 | 45:49:21 h | 13.-15.07.2024 | 280km | Ikeda, Shuji | JPN | 1972 | 1 | M | 1 | M50 | 1 |
| 3 | 47:02:09 h | 15.-17.07.2023 | 280km | Takasawa, Masaki | JPN | 2 | M | 2 | #NA | ||
| 4 | 47:49:06 h | 19.-21.07.2025 | 300km | Miyamoto, Mamoru | JPN | 1982 | 1 | M | 1 | M40 | 1 |
| 5 | 2d 00:20:35 h | 15.-17.07.2023 | 280km | Arai, Hidetsugu | JPN | 1972 | 3 | M | 3 | M50 | 1 |
| 6 | 2d 00:43:11 h | 13.-15.07.2024 | 280km | Miyamoto, Mamoru | JPN | 1982 | 2 | M | 2 | M40 | 1 |
| 7 | 2d 01:03:36 h | 13.-15.07.2024 | 280km | Yabumoto, Yoshikazu | JPN | 1969 | 3 | M | 3 | M55 | 1 |
| 8 | 2d 01:55:35 h | 13.-15.07.2024 | 280km | Yoshizawa, Kyohei | JPN | 1976 | 4 | M | 4 | M45 | 1 |
| 9 | 2d 03:10:01 h | 13.-15.07.2024 | 280km | Kadowaki, Kenji | JPN | 1974 | 5 | M | 5 | M50 | 2 |
| 10 | 2d 03:12:35 h | 13.-15.07.2024 | 280km | Okumura, Naoki | JPN | 1977 | 6 | M | 6 | M45 | 2 |
| 11 | 2d 03:38:35 h | 15.-17.07.2023 | 280km | Kakizaki, Mieko | JPN | 1974 | 4 | F | 1 | W45 | 1 |
| 12 | 2d 03:38:36 h | 13.-15.07.2024 | 280km | Murata, Takatoshi | JPN | 1977 | 7 | M | 7 | M45 | 3 |
| 13 | 2d 04:12:39 h | 13.-15.07.2024 | 280km | Fujiwara, Kazukiyo | JPN | 1966 | 8 | M | 8 | M55 | 2 |
| 14 | 2d 04:36:16 h | 15.-17.07.2023 | 280km | Ikeda, Shuji | JPN | 1972 | 5 | M | 4 | M50 | 2 |
| 15 | 2d 04:36:55 h | 15.-17.07.2023 | 280km | Miyamoto, Mamoru | JPN | 1982 | 6 | M | 5 | M40 | 2 |
| 16 | 2d 04:37:18 h | 15.-17.07.2023 | 280km | Hashino, Yasuaki | JPN | 1969 | 7 | M | 6 | M50 | 3 |
| 17 | 2d 04:43:59 h | 19.-21.07.2025 | 300km | Ikeda, Shuji | JPN | 1972 | 2 | M | 2 | M50 | 1 |
| 18 | 2d 04:44:01 h | 19.-21.07.2025 | 300km | Hashino, Yasuaki | JPN | 1969 | 3 | M | 3 | M55 | 1 |
| 19 | 2d 04:44:13 h | 13.-15.07.2024 | 280km | Yagi, Hironori | JPN | 1965 | 9 | M | 9 | M55 | 3 |
| 20 | 2d 04:46:10 h | 15.-17.07.2023 | 280km | Minaki, Yasuhide | JPN | 1983 | 8 | M | 7 | M40 | 3 |
| 21 | 2d 04:54:51 h | 19.-21.07.2025 | 300km | Murata, Takatoshi | JPN | 1977 | 4 | M | 4 | M45 | 1 |
| 22 | 2d 04:55:55 h | 15.-17.07.2023 | 280km | Usui, Takeo | JPN | 1971 | 9 | M | 8 | M50 | 4 |
| 23 | 2d 05:14:43 h | 13.-15.07.2024 | 280km | Yamamoto, Youko | JPN | 1977 | 10 | F | 1 | W45 | 1 |
| 24 | 2d 05:14:48 h | 13.-15.07.2024 | 280km | Tateno, Hisayuki | JPN | 1971 | 11 | M | 10 | M50 | 3 |
| 25 | 2d 05:15:31 h | 13.-15.07.2024 | 280km | Hashino, Yasuaki | JPN | 1969 | 12 | M | 11 | M55 | 4 |
| 26 | 2d 05:38:10 h | 15.-17.07.2023 | 280km | Kuwata, Naoyuki | JPN | 1968 | 10 | M | 9 | M55 | 1 |
| 27 | 2d 05:41:30 h | 15.-17.07.2023 | 280km | Takahashi, Masanori | JPN | 1975 | 11 | M | 10 | M45 | 1 |
| 28 | 2d 05:48:31 h | 15.-17.07.2023 | 280km | Nakamura, Toshihisa | JPN | 1982 | 12 | M | 11 | M40 | 4 |
| 29 | 2d 05:56:33 h | 19.-21.07.2025 | 300km | Yamazaki, Tomohiro | JPN | 5 | M | 5 | #NA | ||
| 30 | 2d 06:17:13 h | 19.-21.07.2025 | 300km | Kubota, Atsushi | JPN | 1967 | 6 | M | 6 | M55 | 2 |
| 31 | 2d 06:29:50 h | 13.-15.07.2024 | 280km | Kawakami, Shinya | JPN | 1986 | 13 | M | 12 | M35 | 1 |
| 32 | 2d 06:40:14 h | 13.-15.07.2024 | 280km | Hoshino, Masakazu | JPN | 1975 | 14 | M | 13 | M45 | 4 |
| 33 | 2d 06:40:37 h | 19.-21.07.2025 | 300km | Sakai, Kosuke | JPN | 1975 | 7 | M | 7 | M50 | 2 |
| 34 | 2d 06:45:49 h | 13.-15.07.2024 | 280km | Sato, Yusuke | JPN | 1972 | 15 | M | 14 | M50 | 4 |
| 35 | 2d 06:46:29 h | 13.-15.07.2024 | 280km | Hattori, Masahiro | JPN | 1970 | 16 | M | 15 | M50 | 5 |
| 36 | 2d 06:52:56 h | 19.-21.07.2025 | 300km | Koyama, Tomohisa | JPN | 1974 | 8 | M | 8 | M50 | 3 |