Also the operators of Koriwasen were citizens who usually lived on fishing; therefore, since the operators could not trade in such expensive commodities as pepper, tanboku, and copper, they exchanged salt and fish with rice.
興利倭船の担い手は平常は漁を行なっているような庶民であり、使送船のように胡椒・丹木・銅のような高価な物資を取り扱うことは出来ず、塩や魚をもって米穀に替えていた。