| Conflict: | Battle of Ozawahara |
| Partof: | the Sengoku period |
| Date: | 1530 |
| Place: | Ozawahara, Musashi Province, Japan |
| Map Type: | Japan Kanagawa Prefecture#Japan |
| Map Relief: | yes |
| Result: | Hojo victory |
| Combatant1: | forces of the Hōjō clan |
| Combatant2: | forces of the Uesugi clan |
| Commander1: | Hōjō Ujiyasu |
| Commander2: | Uesugi Tomooki |
The Battle of Ozawahara was fought in 1530 in the present day Asao, Kawasaki, Kanagawa. This was the first battle for Hōjō Ujiyasu, then sixteen years old.[1]
Ujiyasu faced Uesugi Tomooki at Ozawahara in Musashi Province. The battle was part of a seventeen-year struggle between the Hōjō clan and the Uesugi clan for control of the Kantō region which began with the 1524 Siege of Edo. The battle ended with a Hōjō victory.