was a 16th century Kyushu warrior who was invited by Sue Harukata

Sue Harukata

was a retainer of the Ōuchi clan in the Sengoku period in Japan. Harukata would later become a daimyo. He was the second son of Sue Okifusa, senior retainer of the Ōuchi clan. His childhood name was Goro. Before Harukata he had the name of Takafusa...

, who had just taken control of the Ōuchi clan, to serve as the official head of the Ōuchi while Sue pulled the strings from behind. Yoshinaga was the younger brother of Ōtomo Yoshishige. Following Mōri Motonari

Mori Motonari

was a prominent daimyō in the west Chūgoku region of Japan during the Sengoku period of the 16th century.-Early years:Mōri Motonari was born under the name Shojumaru in a small domain of Aki province in 1497. He is said to have been born at Suzuo Castle, his mother's homeland...

's victory over Sue in 1555 at Miyajima

Itsukushima

is an island in the western part of the Inland Sea of Japan, located in the northwest of Hiroshima Bay. It is popularly known as , the Shrine Island. The island is one of . Itsukushima is part of the city of Hatsukaichi in Hiroshima Prefecture...

, Yoshinaga's position became quite vulnerable. Yoshinaga was forced to commit suicide in 1557, effectively causing the Ōuchi clan to become extinct.