Otsuya no Kata おつやの方 | |
|---|---|
 | |
| Castellan of Iwamura castle (De facto Toyama clan head) | |
| Assumed office 1572 | |
| Preceded by | Tōyama Kagetō |
| Personal details | |
| Died | December 1575 |
| Spouse(s) | Tōyama Kagetō Akiyama Nobutomo |
| Relatives | Oda Nobunaga (nephew) Oichi (niece) |
| Military service | |
| Allegiance |  Oda clan Takeda clan |
| Unit | Toyama clan |
| Battles/wars | Siege of Iwamura castle |
Lady Otsuya (おつやの方 Otsuya no Kata) was a Japanese female samurai (onna-musha) from the Sengoku period. She was a daughter of the Oda clan and served as ruler of Iwamura Castle until the last days of her life.
Otsuya is best known as the aunt of Oda Nobunaga, and was also the wife of Hibino Kiyozane and Tōyama Kagetō, and a foster mother to Oda Katsunaga. Her execution under Nobunaga may have been a major factor in the decline in Nobunaga's reputation, who would later be murdered by Akechi Mitsuhide and other traitors in the Incident of Honnoji.