Utilizing the authority of the Muromachi bakufu (Japanese feudal government headed by a shogun) which had already been in name only, he was given the posts of Shugoshiki (military governor) and Kyushu Tandai (local commissioner) by providing an enormous amount of money for presentation and established justification for governing Kyushu region.
すでに有名無実となっていた室町幕府の権威を利用し、莫大な献上金を差し出して守護職・九州探題職を得、九州支配の正当化を確立している。