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| Name: | Shiratori, Ritsuko | 白鳥律子 |
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| Club: | Ttrc | ||
| Residence: | Tokyo | ||
| Year of birth: | 1965 | (Cat. german: W60) | |
| Date of birth: | 00.00.0000 | (Cat. internat.: W60) | |
| Nationality: | JPN  |
Japan | |
| RunnerID: | 704033 | ||
14 search results (14 Events, 1143 km). (More)
| 2025 | 2 Events, 168 km (More) | ||||
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| 20.07.2025 | OSJ Ontake 100km Ultra Trail (JPN) | 100km | |||
| 16:55:34 h | Shiratori, Ritsuko | *Tokyo | Overall: 646 | F: 95 | Cat W55: 14 |
| 18.05.2025 | Yatsugatake Nobeyama 68 km (JPN) | 68km | |||
| 9:36:03 h | Shiratori, Ritsuko | Overall: 193 | F: 57 | Cat W55: 4 | |
| 2024 | 3 Events, 236 km (More) | ||||
| 03.11.2024 | Koshu Alps Haute Route Challenge (JPN) | 68km | |||
| 16:49:32 h | Shiratori, Ritsuko | Overall: 131 | F: 24 | Cat W55: 7 | |
| 14.07.2024 | OSJ Ontake 100km Ultra Trail (JPN) | 100km | |||
| 17:11:52 h | Shiratori, Ritsuko | Ttrc | Overall: 587 | F: 88 | Cat W55: 11 |
| 19.05.2024 | Yatsugatake Nobeyama 68 km (JPN) | 68km | |||
| 9:23:24 h | Shiratori, Ritsuko | Overall: 136 | F: 33 | Cat W55: 5 | |
| 2023 | 2 Events, 171 km (More) | ||||
| 16.07.2023 | OSJ Ontake 100km Ultra Trail (JPN) | 100km | |||
| 19:43:56 h | Shiratori, Ritsuko | Ttrc | Overall: 673 | F: 126 | Cat W55: 18 |
| 21.05.2023 | Yatsugatake Nobeyama 71 km (JPN) | 71km | |||
| 9:48:03 h | Shiratori, Ritsuko | Overall: 121 | F: 41 | Cat W55: 7 | |
| 2021 | 1 Event, 50 km (More) | ||||
| 07.11.2021 | Koshu Alps Lily Route Challenge (JPN) | 50km | |||
| 11:12:58 h | Shiratori, Ritsuko | Overall: 126 | F: 22 | Cat W55: 2 | |
| 2018 | 2 Events, 148 km (More) | ||||
| 03.06.2018 | Ultramarathon Okumusashi (JPN) | 78km | |||
| 10:16:12 h | Shiratori, Ritsuko | *Tokyo | Overall: 774 | F: 134 | Cat W50: 25 |
| 14.04.2018 | Toda Saiko 70 km (JPN) | 70km | |||
| 8:20:07 h | Shiratori, Ritsuko | *Tokyo | Overall: 429 | F: 67 | Cat W50: 12 |
| 2017 | 1 Event, 100 km (More) | ||||
| 23.07.2017 | North Okhotsk 100 Km Marathon (JPN) | 100km | |||
| 13:39:06 h | Shiratori, Ritsuko | *Tokyo | Overall: 216 | F: 36 | Cat W50: 6 |
| 2015 | 3 Events, 270 km (More) | ||||
| 28.06.2015 | Lake Saroma 100 Km Ultramarathon (JPN) | 100km | |||
| 12:51:24 h | Shiratori, Ritsuko | *Tokyo | Overall: 2479 | F: 359 | Cat W45: 70 |
| 11.04.2015 | Toda Saiko 70 km (JPN) | 70km | |||
| 8:33:22 h | Shiratori, Ritsuko | *Tokyo | Overall: 371 | F: 61 | Cat W45: 16 |
| 28.03.2015 | Izu Oshima Ultra 100 Km (JPN) | 100km | |||
| 12:25:21 h | Shiratori, Ritsuko | Overall: 77 | F: 11 | Cat W45: 3 | |
Personal bests
Your list of personal best performances only contains performances of races which can be included into rankings.
In brackets rank in yearly international/national rankings.
| PB | 2025 | 2024 | 2023 | 2021 | 2018 | 2017 | 2015 | |
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| 100km | 12:51:24 |
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12:51:24
(1205/563) |
Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2024 | 2023 | 2021 | 2018 | 2017 | 2015 | ||
|---|---|---|---|---|---|---|---|---|
| OSJ Ontake 100km Ultra Trail | 3 | 16:55:34 | 17:11:52 | 19:43:56 | ||||
| Yatsugatake Nobeyama 71 km | 3 | 9:36:03 | 9:23:24 | 9:48:03 | ||||
| Toda Saiko 70 km | 2 | 8:20:07 | 8:33:22 |