You might be referring to the end of the age of warring states, when Tokugawa Ieyasu 'unified' Japan. This was in the early 17th century.
it didn't help with anything
An example of a daimyo is a person who owned a large piece of land in Japan.
It is Daimyo
they unify by means of flying
NO
The daimyo help weaken the shogun by fighting to break free the shogun's control.
In the late 1500's Samurai worked to unify Japan.
Oda Nobunaga was a daimyo of Japan
Daimyo
Oda Nobunaga was a daimyo. He was one of many daimyo who wanted to get enough power then rule Japan. He defeated all those who were competing against his for the power, and he seized Kyoto the capital in 1568. His motto was "rule the empire by force." He wanted to destroy all his enemies and all his rivals. He was harsh with his rule and so he could not unify Japan. In 1582, he committed seppuku because his one of his own general's turned against him.
The daimyo help weaken the shogun by fighting to break free the shogun's control.