Ujiharu was the son of Oda Masaharu and held Oda castle in Hitachi as a local power. When he came to power in 1548, the state of his clan was in decline and he was hard-pressed by the Yuki and Satake. He was defeated by the Satake in 1559 and in 1569 lost Oda castle. He finally surrendered to the Satake in 1583 and sent his family as hostages. After 1590 he was deprived of what remained of his domain. He was known for his love of renga.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005