| Yasuaki Yamasaki | |
| Position: | Pitcher |
| Team: | Yokohama DeNA BayStars |
| Number: | 19 |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 2 October 1992 |
| Birth Place: | Arakawa, Tokyo, Japan |
| Debutdate: | March 28 |
| Debutyear: | 2015 |
| Debutteam: | Yokohama DeNA BayStars |
| Debutleague: | NPB |
| Statyear: | 2023 |
| Stat1label: | Win–loss Record |
| Stat1value: | 19-31 |
| Stat2label: | Earned Run Average |
| Stat2value: | 2.78 |
| Stat3label: | Strikeouts |
| Stat3value: | 494 |
| Stat4label: | Saves |
| Stat4value: | 227 |
| Teams: |
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| Awards: | |
is a Japanese professional baseball pitcher for the Yokohama DeNA BayStars of Nippon Professional Baseball (NPB).
Yamasaki was drafted with the first pick by the Yokohama DeNA BayStars in 2014 Nippon Professional Baseball draft.[1] He has been selected as an all-star five times in his career.
Yamasaki was selected for the Japan national baseball team at the 2015 WBSC Premier12.
On August 20, 2018, he was selected to be on the Samurai Japan Roster for the 2018 MLB Japan All-Star Series.[2]
On February 27, 2019, he was selected for the Japan national baseball team at the 2019 exhibition games against Mexico.[3]
On October 1, 2019, he was again selected for the Japan national team at the 2019 WBSC Premier12.[4]
Yamasaki has a Japanese father and a Filipino mother. [5]