Toshikatsu served Ukita Naoie of Bizen province and was in 1549 awarded Narayama castle. He was one of the original core Ukita retainers and so was present for most of Naoie's battles. He distinguished himself in a clash with Mimura Iechika and against the Môri family in 1569. He went on to serve in the Ukita contingent at Toyotomi Hideyoshi's siege of Takamatsu castle in 1582 and in 1585 joined the invasion of Shikoku. He accompanied Ukita Hideie to Korea in 1592 but there died of illness.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005