Among that Nagayoshi MORI and Tsuneoki IKEDA, who were eager to restore reputation from former defeat, started a surprise attack of Mikawa, having Hidetsugu MIYOSHI (Hidetsugu TOYOTOMI), a nephew of Hideyoshi, a commander in chief on April 6.
そのような中、前の敗戦で面目躍如に燃える森長可や池田恒興らが、秀吉の甥である三好秀次（豊臣秀次）を総大将に擁して4月6日、三河奇襲作戦を開始した。