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 the ruler of Iwamura Castle until the last days of her life.
According to legend, Otsuya is best known for the aunt of the famous samurai Oda Nobunaga, the wife of Tōyama Kagetō and foster mother of Oda Katsunaga. She also having conspired against the Oda clan and fought against her nephew, Oda Nobunaga. Her execution under Nobunaga may have been one of the reasons for the decline in Nobunaga's reputation, who would later be murdered by Akechi Mitsuhide and other traitors in the Incident of Honnoji.