Ishikawa Kazumasa | |
|---|---|
| 石川 数正 | |
 Ishikawa Kazumasa in Nagashino | |
| Lord of Matsumoto | |
| In office 1590–1609 | |
| Personal details | |
| Born | 1534 Mikawa Province |
| Died | 1609 (aged 74–75) |
| Military service | |
| Allegiance |  Matsudaira clan Imagawa clan Tokugawa clan Toyotomi clan |
| Unit |  Ishikawa clan |
| Commands | Matsumoto Castle |
| Battles/wars | Siege of Terabe (1558) Siege of Marune (1560) Siege of Kaminogo Castle (1562) Battle of Azukizaka (1564) Battle of Anegawa (1570) Battle of Mikatagahara (1573) Battle of Nagashino (1575) Battle of Komaki and Nagakute (1584) |
Ishikawa Kazumasa (石川 数正, 1534–1609) was a Japanese notable retainer under Tokugawa Ieyasu, who served him since childhood, when they were both hostages under the Imagawa in 1551.