Although the entrance for boats was decided under the agreement, the area held such an abundant supply of different freshwater fish that it was said that any boat was allowed to catch as much fish as possible after leaving.
船の出入りする場所は協定されるが、一旦船を出したら獲れるだけ獲ってよいという説があるほど多種多様な淡水魚の宝庫だった。