Ogasawara Masanaga

Ogasawara Masanaga (1319–1365) was a Northern Court general and head of the Shinano Ogasawara, Sadamune's son. He fought under Ashikaga Takauji, and in 1345 his father transferred to him the Shinano shugo post and its core estates.

During the Kannō Disturbance he went over to Ashikaga Tadayoshi in 1351, but soon returned to Takauji and was reinstated as shugo. He led Takauji's vanguard into Tōtōmi and in 1355 helped crush Prince Muneyoshi's rising at Kikyōgahara. He died in 1365, leaving the military treatise Gunjutsu Heiyōki.