That was the battle of Nagashino, at the time the Takeda cavalry was recognized as the most powerful fighting force in Japan, especially under the Tiger of Kai, Takeda Shingen, though he had died in a previous battle against the Tokugawa so his son Katsoyuri was in charge and he was a young reckless person trying to live up to his fathers standards and assumed his invincible cavalry would destroy the Oda. The Takeda didn't last long after Nagashino, being absorbed by the Oda and Tokugawa.
Fun fact it was Shingen that inspired Nobunaga's ephitat of Demon King, Shortly after Nobunaga set a mountain of fire to get rid of some monks who were opposing him Shingen wrote a letter decrying him as a Demon, Nobugana being the troll that he was embraced the title and went one further by basically saying" fine i'll be the Demon King then" Fucking love this period of Japan.