| Masumi Aoki | |
| Birth Date: | 16 April 1994 |
| Birth Place: | Okayama City, Japan[1] |
| Height: | 1.66 m |
| Weight: | 58 kg |
| Sport: | Athletics |
| Event: | 100 m hurdles |
| Education: | International Pacific University |
| Show-Medals: | yes |
is a Japanese athlete specialising in the sprint hurdles. She won a bronze medal at the 2019 Asian Championships.
Her personal bests are 13.17 seconds in the 100 metres hurdles (+1.1 m/s, Yamaguchi 2018) and 8.18 seconds in the 60 metres hurdles (Osaka 2019).
| Representing | ||||||
|---|---|---|---|---|---|---|
| 2011 | World Youth Championships | Lille, France | 18th (sf) | 200 m | 24.64 | |
| 9th (h) | Medley relay | 2:10.54 | ||||
| 2014 | Asian Games | Incheon, South Korea | 9th (h) | 100 m hurdles | 13.76 | |
| 3rd | 4 × 100 m relay | 44.05 | ||||
| 2016 | Asian Indoor Championships | Doha, Qatar | 5th | 100 m hurdles | 8.36 | |
| 2018 | Asian Games | Jakarta, Indonesia | 5th | 100 m hurdles | 13.63 | |
| 5th | 4 × 100 m relay | 44.93 | ||||
| 2019 | Asian Championships | Doha, Qatar | 3rd | 100 m hurdles | 13.28 | |
| 2021 | Olympic Games | Tokyo, Japan | 37th (h) | 100 m hurdles | 13.59 | |
| 2022 | World Championships | Eugene, United States | 21st (sf) | 100 m hurdles | 13.04 | |
| 12th (h) | 4 × 100 m relay | 43.33 | ||||
| 2023 | Asian Indoor Championships | Astana, Kazakhstan | bgcolor=gold | 1st | 60 m hurdles | 8.01 |
| Asian Championships | Bangkok, Thailand | 3rd | 100 m hurdles | 13.26 | ||
| World Championships | Budapest, Hungary | 39th (h) | 100 m hurdles | 13.26 | ||
| Asian Games | Hangzhou, China | 5th | 100 m hurdles | 13.34 | ||
| 2024 | World Indoor Championships | Glasgow, United Kingdom | 27th (h) | 60 m hurdles | 8.13 | |