Reducing the number of toshu saikensen (ships of head family of the So clan to dispatch an annual envoy to Korea) from fifty, which number was determined in the Kakitsu Treaty, to twenty-five.
島主歳遣船（宗氏本宗家が毎年遣わす使送船）を嘉吉条約における50隻から半分の25隻に削減。