welp, guess not

Capturing Kyoto alone does not make someone a shogun.
Toyotomi Hideyoshi could only call himself Taikō after conquering the whole Japan from Kyushu in the west all the way to the Ezo lands in the north.
Tokugawa Ieyasu relied on the overwhelming military power of the Kanto region to dominate other daimyō and overthrow the Toyotomi regime, which enabled him to establish a new shogunate.