Background
He was the son of Hongo Tokihisa, another Shimazu vassal.
北郷 忠虎
He was the son of Hongo Tokihisa, another Shimazu vassal.
In 1573, Tadatora and his father held Kumamoto Castle against an attack by the Kimotsuki family. Tadatora died in of Korea, at Karashima island (modern-day Kadok-do).