Ii Naomasa

Hashiba Hideyoshi fought Oda Nobukatsu and Tokugawa Ieyasu in Owari. While the armies sat facing each other at Komakiyama and Gakuden, a Hashiba column swung towards Mikawa and was destroyed at Nagakute. Ieyasu won the field; Hideyoshi won the settlement by making a separate peace with Nobukatsu.

Tadakatsu participated as military supervisor of the Eastern Army, deploying west of Tsuzura Pond. In the afternoon he, along with Matsudaira Tadayoshi and Ii Naomasa, pursued the forces of Shimazu Yoshihiro.