Toyotomi Hidenaga

Toyotomi Hidenaga (1540–1591) was a warlord of the Azuchi-Momoyama period and an outstanding aide who quietly supported his elder brother, the tenkabito (ruler of the realm) Toyotomi Hideyoshi. Known by the title “Yamato Dainagon,” he was highly regarded both at home and abroad as a warlord whose presence was indispensable to the stability of the Toyotomi regime.

Hidenaga was born in Owari Province (present-day Aichi Prefecture). After his elder brother Hideyoshi entered the service of Oda Nobunaga, the two served together as Nobunaga's retainers. As Hideyoshi's career advanced, Hidenaga also rose to prominence. He took part in the battles that were important to the establishment of the Toyotomi regime, including the Battle of Yamazaki (1582), the Battle of Shizugatake (1583), and the Battle of Komaki and Nagakute (1584), and distinguished himself in them.

The reason Hidenaga is highly valued by later generations lies not only in his military achievements but also in his outstanding abilities in domestic administration and diplomacy, with which he supported his elder brother Hideyoshi. Whereas Hideyoshi was free-spirited and emotional, Hidenaga is known as calm, gentle, and sincere, and the two brothers formed an ideal relationship in which each made up for the other's strengths. In the Kyūshū Campaign (1587), he served as commander-in-chief of the Hyūga front, drove back the Shimazu forces, and had Shimazu Yoshihisa propose peace. He also acted as a mediator between Hideyoshi and the various daimyō, and functioned as a true pillar of the Toyotomi regime. It is said that when Ōtomo Sōrin came up to the capital, Hidenaga told him, “Private matters are for Sōeki (Sen no Rikyū); public matters are for the Saishō (Hidenaga).”

In relation to Japanese swords, Hidenaga held Yamato, Kii, and Izumi as his domains and made Kōriyama Castle (present-day Yamato-Kōriyama City) his base. In Tenshō 15 (1587), he was appointed Junior Second Rank, Provisional Major Counselor (Gon-Dainagon), and came to be called “Yamato Dainagon.” Yamato has long been renowned as a center of sword production and was the home base of the swordsmiths of the “Yamato-den.”

On 15 February 1591 (Tenshō 19/1/22), Hidenaga died of illness at Kōriyama Castle in Yamato at the age of 52. His death dealt a major blow to the Toyotomi regime, and the assessment “If Hidenaga had lived, there would have been no tragedy for the Toyotomi house” has been passed down to later generations. His way of life might well be called a model of what an aide should be. Although he remained overshadowed by the brilliant achievements of his elder brother Hideyoshi, he embodies one ideal form of a Sengoku-period warlord and is still highly regarded today.