| Mao Ichiyama | |
| Native Name: | 一山 麻緒 |
| Native Name Lang: | Japanese |
| Nickname: | Mao-chan, Ichichi |
| Ethnicity: | Japanese |
| Birth Date: | 29 May 1997 |
| Birth Place: | Izumi, Kagoshima Prefecture |
| Alma Mater: | Izumi Central High School |
| Height: | 1.58 m |
| Weight: | 43 kg |
| Sport: | Track and field |
| Event: | 1500 metres – Marathon |
| Club: | Wacoal (ワコール) |
| Team: | Adidas (to 2020) Nike (2020 —) |
| Turnedpro: | 2016 |
is a Japanese long-distance runner. She represented Japan at the 2020 Tokyo Olympics.
Ichiyama is winner of 2017 Fukuoka International Cross Country (8 km in 26:46) and 2020 Nagoya Women's Marathon in 2:20:29 thus beating 2:21:47 time of Mizuki Matsuda (2020 Osaka International Women's Marathon) to enter as third participant to 2020 Tokyo Olympics, together with Honami Maeda and Ayuko Suzuki.[1] She won 2021 Osaka Women's Marathon with new event record 2:21:11.[2] [3]
Mao Ichiyama was sponsored by Adidas. From 2020 Nagoya Women's Marathon she is sponsored by Nike, where she made her Marathon personal best.
Key:
| Representing | ||||||
|---|---|---|---|---|---|---|
| 2017 | Rock 'n' Roll Virginia Beach Half Marathon | Virginia Beach, United States | bgcolor=gold | 1st | Half Marathon | 1:13:49 |
| Sanyo Women's Half Marathon | Okayama, Japan | 3rd | Half Marathon | 1:09:14 | ||
| 2018 | World Half Marathon Championships | Valencia, Spain | 19th | Half Marathon | 1:11:02 | |
| BOLDERBoulder 10k | Boulder, United States | 8th | 10 km | 34:10 | ||
| KBC Night of Athletics | Heusden-Zolder, Belgium | 19th | 5000 m | 15:45.56 | ||
| 2019 | Marugame, Japan | 6th | Half marathon | 1:10:49 | ||
| Tokyo Marathon | Tokyo, Japan | 7th | Marathon | 2:24:33 | ||
| London Marathon | London, United Kingdom | 17th | Marathon | 2:27:27 | ||
| Hakodate Marathon | Hakodate, Japan | bgcolor=gold | 1st | Half marathon | 1:08:49 | |
| 2020 | Marugame, Japan | 5th | Half marathon | 1:08:56 | ||
| Nagoya Women's Marathon | Nagoya, Japan | bgcolor=gold | 1st | Marathon | 2:20:29 | |
| 2021 | Osaka Women's Marathon | Osaka, Japan | bgcolor=gold | 1st | Marathon | 2:21:11 |
| Olympic Games | Sapporo, Japan | 8th | Marathon | 2:30:13[4] | ||
| 2022 | Tokyo Marathon | Tokyo, Japan | 6th | Marathon | 2:21:02 | |