| Masanori Ishikawa | |
| Position: | Pitcher |
| Team: | Tokyo Yakult Swallows |
| Number: | 19 |
| Bats: | Left-handed |
| Throws: | Left-handed |
| Birth Date: | 22 January 1980 |
| Birth Place: | Akita City, Akita, Japan |
| Debutleague: | NPB |
| Debutdate: | April 4 |
| Debutyear: | 2002 |
| Debutteam: | Yakult Swallows |
| Statyear: | 2023 season |
| Statleague: | NPB |
| Stat1label: | Win–loss record |
| Stat1value: | 185-185 |
| Stat2label: | Earned run average |
| Stat2value: | 3.88 |
| Stat3label: | Strikeouts |
| Stat3value: | 1,768 |
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is a Japanese professional baseball player. He is currently a pitcher for the Tokyo Yakult Swallows. Up to 2023 season, he is the oldest professional baseball player.
Ishikawa began his career with the Yakult Swallows in 2002, making his Nippon Professional Baseball (NPB) debut on April 4, 2002.
On April 7, 2022, Ishikawa became the 3rd pitcher in NPB history to record a hit in 21 consecutive seasons. The other pitchers to achieve the feat were Masaaki Koyama from 1953 to 1973 and Daisuke Miura (the manager of the Yokohama DeNA BayStars at the time) from 1993 to 2016.[1]