Between Japan and the Ming dynasty, Nichiji Kango or Nichijigo Kango (a tally or a trading license with the Japanese letter of nichi [日]) and Honji Kango (a tally or a trading license with the Japanese letter of hon [本]) were used; to trade, a Honji Kango (of which there were one hundred copies: Honji Nos.1 to 100) was brought by the Japanese envoy ship to the seaport in Ming (Ningbo), and compared with the Honji Kango teibo that the Ming dynasty possessed.
日明間では、日字勘合(日字号勘合)と本字勘合があり、本字勘合(百道：本字一号～百号)を日本の遣明船が明の港(寧波)に持参し、明の所有する本字勘合底簿と照合する。