However, in the eastern Japan gold coins (koban) were circulated as large denomination coins, while in the western Japan, silver coins (chogin), and the exchange rate fluctuated on a daily basis, the financial industry including money brokers developed.
しかしながら、高額貨幣は、東日本は金貨（小判）が、西日本は銀貨（丁銀）が流通の基本となっており、その相場も日々変動したため、両替商などの金融業を発達した。