Sanbōshi

Eldest son of Oda Nobutaka and legitimate grandson of Oda Nobunaga. He lost both his grandfather and father in the Honnō-ji Incident of 1582; at age three, the Kiyosu Conference designated him as the Oda succession heir. Successively placed under the guardianship of his uncle Oda Nobutaka and then Hashiba Hideyoshi, with Gifu Castle held alternately by the Ikeda and Toyotomi Hideyoshi. In 1592, as Hidenobu, he took Gifu Castle and was granted 133,000 koku, the largest domain in Mino Province, along with allied lords. Records show administrative actions including merchant district development, going beyond the image of a puppet child-lord from the Kiyosu Conference. In 1600, leading western forces with the Kiso River as his defensive line, but on August 23 Gifu Castle fell; he surrendered, became a monk, was sent to Mount Kōya, and died in 1605.

Sources　岐阜市「岐阜城の歴代城主：織田信孝・織田秀信」／岐阜市「史跡岐阜城跡整備基本計画」／岐阜市「史跡岐阜城跡保存活用計画」／岐阜県歴史資料館「織田秀信禁制 写」／江南市「織田秀信禁制」／文教大学教育学部・中村修也「清須会議の意味」／コトバンク「鏡嶋湊」