in 1185 , the taira clan and minamoto clan fought each other in the decisive war , the battle of dannoura . そして寿永4年（1185年）、最期の決戦である壇ノ浦の戦いで平氏と源氏が激突。
at mikatagahara in totomi province , ieyasu came to an epic and decisive war against shingen on february 4 , 1573 . 遠江三方ヶ原において、12月22日 (旧暦)に信玄と一大決戦を挑む。
toyotomi ' s side , whose troop strength was exhausted because of repeated defeat , tried to tough out the decisive war when ieyasu and hidetada took up their positions in osaka . 敗戦続きで兵力が疲弊した豊臣方は家康、秀忠が大坂に布陣したところに最終決戦を挑む。
