The true reason that Nobunaga attacked Muto comes to light, and it was to go after Asakura Yoshikage of the Echizen Province. The allied forces of Oda and Tokugawa first take over Tezutsuyama Castle, and then take over Kanegasaki Castle, but Hisahide and Hanbee seem to think things are going too well...
I've sent a messenger to our 
longtime ally, the Azai clan...
...أرسلتُ رسولاً لحليفنا القديم، عشيرة أزاي
Ich habe einen Boten zu meinen langjährigen
Verbündeten, dem Azai-Klan, geschickt,
Envié un mensajero
a nuestros aliados en Azai.
He enviado un mensajero
a nuestros aliados en Azai.
J’ai envoyé un messager
au clan Azai…
Ho mandato un messaggero
ai nostri storici alleati, gli Asai,
Enviei um mensageiro para nosso
aliado de longa data, o clã Azai!