Toyotomi Hidetsugu
On the seventh day of the fourth month, Ieyasu learned of Hidetsugu's encampment at Shinogi (modern-day Kasugai) through the information provided by farmers in Iga Province. Ieyasu entered into Obata Castle (Moriyama-ku, Nagoya) the following day and chose to pitch camp for the evening. Early the next morning, he sent both Ōsuga Yasutaka and Sakakibara Yasumasa forces to chase after Toyotomi Hidetsugu forces, and followed shortly thereafter with his own. Hidetsugu resumed his march on the eight day after hearing of Ieyasu's entrance to Obata Castle, but on the next morning, the situation changed very rapidly.