| Name: | Iizuka, Naomi | 飯塚直美 |
|
| Club: | オクムスイマー倶楽部 | ||
| Residence: | Kita Ward, Tokyo Pref. | ||
| Year of birth: | 1969 | (Cat. german: W55) | |
| Date of birth: | 25.09.1969 | (Cat. internat.: W55) | |
| Nationality: | JPN ![]() |
Japan | |
| RunnerID: | 77415 | ||
66 search results (62 Events, 10306.416 km). (More)
| 2025 | 5 Events, 1012.73 km (More) | ||||
|---|---|---|---|---|---|
| 19.10.2025 | Ultramarathon Okumusashi (JPN) | 70km | |||
| 7:31:30 h | Iizuka, Naomi | *Tokyo | Overall: 79 | F: 11 | Cat W55: 2 |
| 13.-14.09.2025 | Utsukushima Fukushima Journey Run 128K (JPN) | 128km | |||
| 16:04:03 h | Iizuka, Naomi | *Tokyo | Overall: 6 | F: 3 | Cat W55: 1 |
| 30.04.-05.05.2025 | River Road Foot Race 514 Km (JPN) | 516km | |||
| 5d 10:11:11 h | Iizuka, Naomi | *Tokyo | Overall: 68 | F: 11 | Cat W55: 2 |
| 15.-16.03.2025 | Oedo Night run 115k (JPN) | 115km | |||
| 15:50:35 h | Iizuka, Naomi | *Tokyo | Overall: 12 | F: 3 | Cat W55: 1 |
| 08.-09.03.2025 | Jingu Gaien 24 Hour Challenge (JPN) | 24h | |||
| 183.730 km | Iizuka, Naomi | Overall: 33 | F: 9 | Cat W55: 2 | |
| 08.03.2025 | Jingu Gaien 24 Hour Challenge -12h Split (JPN) | 12h | |||
| 100.667 km | Iizuka, Naomi | Overall: 55 | F: 12 | Cat W55: 1 | |
| 08.03.2025 | Jingu Gaien 24 Hour Challenge - 6h Split (JPN) | 6h | |||
| 55.632 km | Iizuka, Naomi | Overall: 67 | F: 17 | Cat W55: 1 | |
| 2024 | 5 Events, 1346 km (More) | ||||
| 15.-16.09.2024 | Utsukushima Fukushima Journey Run 128K (JPN) | 128km | |||
| 17:25:53 h | Iizuka, Naomi | *Tokyo | Overall: 4 | F: 1 | Cat W50: 1 |
| 30.04.-05.05.2024 | River Road Foot Race 514 Km (JPN) | 514km | |||
| 5d 10:36:32 h | Iizuka, Naomi | チーム凰 | Overall: 74 | F: 16 | Cat W50: 7 |
| 01.-10.04.2024 | Across Honshu R8 Foot Race (JPN) | 535km | |||
| 8d 07:43:04 h | Iizuka, Naomi | *Tokyo | Overall: 3 | F: 2 | Cat W50: 1 |
| 17.03.2024 | Arakawa Riverside Journey Stage Race - Stage 2 (JPN) | 54.2km | |||
| 6:28:00 h | Iizuka, Naomi | *Tokyo | Overall: 20 | F: 4 | Cat W50: 2 |
| 09.-10.03.2024 | Oedo Night run 115k (JPN) | 115km | |||
| 13:54:16 h | Iizuka, Naomi | *Tokyo | Overall: 5 | F: 1 | Cat W50: 1 |
| 2023 | 4 Events, 1204.163 km (More) | ||||
| 06.04.-02.10.2023 | Across Honshu R7 Foot Race - reverse direction (JPN) | 433km | |||
| 8d 11:37:51 h | Iizuka, Naomi | Overall: 6 | F: 2 | Cat W50: 1 | |
| 04.06.2023 | Ultramarathon Okumusashi (JPN) | 78km | |||
| 9:53:55 h | Iizuka, Naomi | *Tokyo | Overall: 402 | F: 74 | Cat W50: 10 |
| 30.04.-05.05.2023 | River Road Foot Race 513 Km (JPN) | 513km | |||
| 5d 11:51:01 h | Iizuka, Naomi | Overall: 81 | F: 13 | Cat W50: 2 | |
| 11.-12.03.2023 | Jingu Gaien 24 Hour Challenge (JPN) | 24h | |||
| 180.163 km | Iizuka, Naomi | Overall: 42 | F: 8 | Cat W50: 2 | |
| 11.-12.03.2023 | Jingu Gaien 24 Hour Challenge -12h Split (JPN) | 12h | |||
| 99.300 km | Iizuka, Naomi | Overall: 60 | F: 12 | Cat W50: 3 | |
| 11.03.2023 | Jingu Gaien 24 Hour Challenge - 6h Split (JPN) | 6h | |||
| 51.636 km | Iizuka, Naomi | Overall: 76 | F: 14 | Cat W50: 3 | |
| 2022 | 4 Events, 827 km (More) | ||||
| 03.-04.09.2022 | Tone River Run Up Journey Run Upstream (JPN) | 121km | |||
| 17:35:58 h | Iizuka, Naomi | Overall: 9 | F: 2 | Cat W50: 1 | |
| 05.06.2022 | Ultramarathon Okumusashi (JPN) | 78km | |||
| 8:27:22 h | Iizuka, Naomi | オクムスイマー倶楽部 | Overall: 208 | F: 37 | Cat W50: 5 |
| 30.04.-05.05.2022 | River Road Foot Race 513 Km (JPN) | 513km | |||
| 5d 08:30:05 h | Iizuka, Naomi | チーム凰 | Overall: 57 | F: 10 | Cat W50: 1 |
| 12.-13.03.2022 | Oedo Night run 115k (JPN) | 115km | |||
| 13:15:57 h | Iizuka, Naomi | *Tokyo | Overall: 7 | F: 1 | Cat W50: 1 |
| 2021 | 4 Events, 816.4 km (More) | ||||
| 16.-17.10.2021 | Tone River Run Up Journey Run Upstream (JPN) | 120km | |||
| 25:08:00 h | Iizuka, Naomi | *Tokyo | Overall: 81 | F: 17 | Cat W50: 3 |
| 04.07.2021 | 8-Hour Endurance Race Tokorozawa (JPN) | 8h | |||
| 78.400 km | Iizuka, Naomi | チーム凰 | Overall: 49 | F: 11 | Cat W50: 1 |
| 30.04.-05.05.2021 | River Road Foot Race 503 Km (JPN) | 503km | |||
| 5d 11:08:14 h | Iizuka, Naomi | Overall: 64 | F: 9 | Cat W50: 2 | |
| 27.-28.03.2021 | Oedo Night run 115k (JPN) | 115km | |||
| 18:54:06 h | Iizuka, Naomi | チーム凰 | Overall: 66 | F: 16 | Cat W50: 4 |
| 2020 | 2 Events, 171 km (More) | ||||
| 22.03.2020 | Arakawa Riverside Journey - 56 km (JPN) | 56km | |||
| 6:22:27 h | Iizuka, Naomi | チーム凰 | Overall: 5 | F: 1 | Cat W50: 1 |
| 22.-23.02.2020 | Oedo Night run 115k (JPN) | 115km | |||
| 14:40:41 h | Iizuka, Naomi | チーム凰 | Overall: 13 | F: 1 | Cat W50: 1 |
| 2019 | 3 Events, 705 km (More) | ||||
| 02.06.2019 | Ultramarathon Okumusashi (JPN) | 78km | |||
| 9:34:57 h | Iizuka, Naomi | オクムスイマー倶楽部 | Overall: 697 | F: 109 | Cat W45: 25 |
| 30.04.-05.05.2019 | River Road Foot Race 514 Km (JPN) | 514km | |||
| 5d 11:29:14 h | Iizuka, Naomi | Overall: 85 | F: 13 | Cat W45: 5 | |
| 23.-24.02.2019 | Oedo Night run 113k (JPN) | 113km | |||
| 13:18:36 h | Iizuka, Naomi | チーム凰 | Overall: 5 | F: 2 | Cat W45: 1 |
| 2018 | 4 Events, 483.845 km (More) | ||||
| 10.-11.11.2018 | Jingu Gaien 24 Hour Challenge (JPN) | 24h | |||
| 190.545 km | Iizuka, Naomi | Overall: 36 | F: 11 | Cat W45: 2 | |
| 29.09.2018 | Coedo Kawagoe Running Fest 12-hours run (JPN) | 12h | |||
| 102.300 km | Iizuka, Naomi | Overall: 4 | F: 1 | Cat W45: 1 | |
| 03.06.2018 | Ultramarathon Okumusashi (JPN) | 78km | |||
| 9:18:17 h | Iizuka, Naomi | 武蔵umc女子部 | Overall: 433 | F: 57 | Cat W45: 10 |
| 03.-04.03.2018 | Oedo Night run 113k (JPN) | 113km | |||
| 13:00:24 h | Iizuka, Naomi | Overall: 5 | F: 1 | Cat W45: 1 | |
| 2017 | 5 Events, 987.012 km (More) | ||||
| 11.-12.11.2017 | Jingu Gaien 24 Hour Challenge (JPN) | 24h | |||
| 174.022 km | Iizuka, Naomi | Overall: 59 | F: 14 | Cat W45: 3 | |
| 30.09.2017 | Coedo Kawagoe Running Fest 12-hours run (JPN) | 12h | |||
| 101.990 km | Iizuka, Naomi | Overall: 3 | F: 1 | Cat W45: 1 | |
| 04.06.2017 | Ultramarathon Okumusashi (JPN) | 78km | |||
| 9:31:19 h | Iizuka, Naomi | 武蔵umc女子部 | Overall: 650 | F: 96 | Cat W45: 15 |
| 30.04.-05.05.2017 | River Road Foot Race 520 Km (JPN) | 520km | |||
| 5d 11:57:40 h | Iizuka, Naomi | Overall: 91 | F: 10 | Cat W45: 2 | |
| 04.-05.03.2017 | Oedo Night run 113k (JPN) | 113km | |||
| 13:30:55 h | Iizuka, Naomi | Overall: 8 | F: 1 | Cat W45: 1 | |
| 2016 | 5 Events, 727.586 km (More) | ||||
| 17.-18.12.2016 | Jingu Gaien 24 Hour Challenge (JPN) | 24h | |||
| 177.086 km | Iizuka, Naomi | Overall: 51 | F: 10 | Cat W45: 2 | |
| 01.10.2016 | Coedo Kawagoe Running Fest 12-hours run (JPN) | 12h | |||
| 104.500 km | Iizuka, Naomi | Overall: 3 | F: 1 | Cat W45: 1 | |
| 05.06.2016 | Ultramarathon Okumusashi (JPN) | 78km | |||
| 9:52:46 h | Iizuka, Naomi | チーム凰 | Overall: 827 | F: 121 | Cat W45: 29 |
| 03.-05.05.2016 | River Road Foot Race 255 Km (JPN) | 255km | |||
| 2d 09:59:15 h | Iizuka, Naomi | Overall: 40 | F: 5 | Cat W45: 2 | |
| 05.-06.03.2016 | Oedo Night run 113k (JPN) | 113km | |||
| 12:52:04 h | Iizuka, Naomi | チーム凰 | Overall: 5 | F: 1 | Cat W45: 1 |
| 2015 | 4 Events, 473.6 km (More) | ||||
| 12.-13.09.2015 | Green Charity Marathon Tokyo - Hard Run 24H (JPN) | 24h | |||
| 184.600 km | Iizuka, Naomi | Overall: 6 | F: 2 | Cat W45: 1 | |
| 22.06.2015 | Ultramarathon Okumusashi (JPN) | 77km | |||
| 9:19:45 h | Iizuka, Naomi | チーム凰 | Overall: 628 | F: 82 | Cat W45: 22 |
| 17.05.2015 | Yatsugatake Nobeyama 100 km (JPN) | 100km | |||
| 13:23:53 h | Iizuka, Naomi | チーム凰 | Overall: 921 | F: 93 | Cat W45: 23 |
| 28.02.-01.03.2015 | Oedo Night run 112k (JPN) | 112km | |||
| 13:44:35 h | Iizuka, Naomi | *Tokyo | Overall: 11 | F: 1 | Cat W45: 1 |
| 2014 | 4 Events, 431 km (More) | ||||
| 14.-15.09.2014 | Karisakatoge beyond Chichibu Run (JPN) | 142km | |||
| 21:46:53 h | Iizuka, Naomi | チーム凰 | Overall: 71 | F: 7 | Cat W40: 4 |
| 27.07.2014 | Ultramarathon Okumusashi (JPN) | 77km | |||
| 9:26:40 h | Iizuka, Naomi | チーム凰 | Overall: 327 | F: 48 | Cat W40: 10 |
| 18.05.2014 | Yatsugatake Nobeyama 100 km (JPN) | 100km | |||
| 13:44:04 h | Iizuka, Naomi | *Tokyo | Overall: 990 | F: 96 | Cat W40: 27 |
| 01.-02.03.2014 | Oedo Night run 112k (JPN) | 112km | |||
| 15:11:56 h | Iizuka, Naomi | チ-ム凰 | Overall: 10 | F: 3 | Cat W40: 3 |
| 2013 | 3 Events, 288 km (More) | ||||
| 28.07.2013 | Ultramarathon Okumusashi (JPN) | 77km | |||
| 9:13:57 h | Iizuka, Naomi | チーム凰 | Overall: 484 | F: 83 | Cat W40: 21 |
| 19.05.2013 | Yatsugatake Nobeyama 100 km (JPN) | 100km | |||
| 12:49:53 h | Iizuka, Naomi | チーム凰 | Overall: 532 | F: 43 | Cat W40: 15 |
| 02.-03.03.2013 | Oedo Night run 111k (JPN) | 111km | |||
| 14:27:03 h | Iizuka, Naomi | *Tokyo | Overall: 5 | F: 1 | Cat W40: 1 |
| 2012 | 2 Events, 177 km (More) | ||||
| 05.08.2012 | Ultramarathon Okumusashi (JPN) | 77km | |||
| 9:34:56 h | Iizuka, Naomi | *Tokyo | Overall: 439 | F: 74 | Cat W40: 19 |
| 20.05.2012 | Yatsugatake Nobeyama 100 km (JPN) | 100km | |||
| 12:57:22 h | Iizuka, Naomi | Overall: 503 | F: 31 | Cat W40: 8 | |
| 2011 | 1 Event, 77 km (More) | ||||
| 07.08.2011 | Ultramarathon Okumusashi (JPN) | 77km | |||
| 10:22:35 h | Iizuka, Naomi | *Tokyo | Overall: 739 | F: 166 | Cat W40: 34 |
| 2010 | 2 Events, 177 km (More) | ||||
| 01.08.2010 | Ultramarathon Okumusashi (JPN) | 77km | |||
| 11:07:07 h | Iizuka, Naomi | *Tokyo | Overall: 760 | F: 147 | Cat W40: 29 |
| 16.05.2010 | Yatsugatake Nobeyama 100 km (JPN) | 100km | |||
| 13:20:57 h | Iizuka, Naomi | 炭や | Overall: 682 | F: 56 | Cat W40: 8 |
| 2009 | 1 Event, 75 km (More) | ||||
| 02.08.2009 | Ultramarathon Okumusashi (JPN) | 75km | |||
| 9:06:36 h | Iizuka, Naomi | *Tokyo | Overall: 440 | F: 67 | Cat W35: 15 |
| 2008 | 2 Events, 177.08 km (More) | ||||
| 03.08.2008 | Ultramarathon Okumusashi (JPN) | 75km | |||
| 8:47:50 h | Iizuka, Naomi | 武蔵ウルトラマラソンクラブ | Overall: 269 | F: 39 | Cat W35: 11 |
| 14.-15.06.2008 | Tokyo Challenge 12 hours (JPN) | 12h | |||
| 102.080 km | Iizuka, Naomi | Overall: 3 | F: 1 | Cat W35: 1 | |
| 2007 | 1 Event, 75 km (More) | ||||
| 05.08.2007 | Ultramarathon Okumusashi (JPN) | 75km | |||
| 8:28:18 h | Iizuka, Naomi | 千代田走友会 | Overall: 173 | F: 25 | Cat W35: 9 |
| 2006 | 1 Event, 75 km (More) | ||||
| 13.08.2006 | Ultramarathon Okumusashi (JPN) | 75km | |||
| 8:54:42 h | Iizuka, Naomi | *Kita Ward, Tokyo Pref. | Overall: 222 | F: 31 | Cat W35: 9 |
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 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6h | 55.632 |
55.632
(451/16) |
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51.636
(758/15) |
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| 12h | 100.667 |
100.667
(250/18) |
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99.300
(354/18) |
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| 24h | 190.545 |
183.730
(205/18) |
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180.163
(205/13) |
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190.545
(96/14) |
174.022
(218/21) |
177.086
(158/11) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ultramarathon Okumusashi | 17 | 7:31:30 | 9:53:55 | 8:27:22 | 9:34:57 | 9:18:17 | 9:31:19 | 9:52:46 | 9:19:45 | 9:26:40 | 9:13:57 | 9:34:56 | 10:22:35 | 11:07:07 | 9:06:36 | 8:47:50 | 8:28:18 | 8:54:42 | |||
| Oedo Night run 111k | 12 | 15:50:35 | 13:54:16 | 13:15:57 | 18:54:06 | 14:40:41 | 13:18:36 | 13:00:24 | 13:30:55 | 12:52:04 | 13:44:35 | 15:11:56 | 14:27:03 | ||||||||
| River Road Foot Race 520 Km | 7 | 130:11:11 | 130:36:32 | 131:51:01 | 128:30:05 | 131:08:14 | 131:29:14 | 131:57:40 | |||||||||||||
| Yatsugatake Nobeyama 100 km | 5 | 13:23:53 | 13:44:04 | 12:49:53 | 12:57:22 | 13:20:57 | |||||||||||||||
| Jingu Gaien 24 Hour Challenge | 5 | 183.730 | 180.163 | 190.545 | 174.022 | 177.086 | |||||||||||||||
| Coedo Kawagoe Running Fest 12-hours run | 3 | 102.300 | 101.990 | 104.500 | |||||||||||||||||
| Tone River Run Up Journey Run Upstream | 2 | 17:35:58 | 25:08:00 | ||||||||||||||||||
| Utsukushima Fukushima Journey Run 128K | 2 | 16:04:03 | 17:25:53 |





