The managers of kangosen (trading vessels between Japan and the Ming in the Muromachi period), such as the Muromachi bakufu (Japanese feudal government headed by a shogun), Shugo daimyo (Japanese territorial lord as provincial constable), namely the Hosokawa clan or Ouchi clan, etc. and temples, collected about a tenth of the total amount of selling prices (the amount converted into Japanese domestic prices) of the imported goods from the traders who had been on board the vessels.
勘合船の経営者の室町幕府や細川氏・大内氏などの守護大名、寺院などが勘合船の帰港後に輸入品の売値総額（日本国内の価格に換算した総額）の1割をその船に便乗した貿易商から徴収した。