Upon Muneyoshi's death in 1606, the school split into two, his elder son Yagyū Toshiyoshi taking command of the Owari branch, while Munenori became the head of the Edo branch.
The school split into two Yagyū Toshiyoshi. This was upon Muneyoshi's death in 1606. This Yagyū Toshiyoshi was taking command of the Owari branch. Munenori became the head of the Edo branch. Two was his elder son.