In 1468, under such a situation, Katata-shu seized the cargo of the fleet that was carrying wood because the shipowners refused to pay Uwanori: Okura Bugyo (the magistrate of storehouse) of the Muromachi bakufu (Japanese feudal government headed by a shogun) had ordered the wood in order to reestablish 'Hana no gosho' (residence of Shogun in Kyoto).
そんな最中の応仁2年（1468年）、室町幕府御蔵奉行が花の御所再建のために調達した木材を運搬する船団が上乗を払わない事を理由に堅田衆によって積荷を差し押さえたのである。