三河
Mikawa was one of Japan's 68 ancient provinces, located in what is now Aichi Prefecture. Mikawa bordered on Owari, Mino, Shinano, and Totomi provinces. The great battle of Nagashino, in which Oda Nobunaga's ashigaru musketeers broke the power of the mighty Takeda clan, took place in Mikawa province in 1575.