Commerical transaction system, administration server, and program

A commerce system comprising:

• an EC server that connects to a user terminal and executes E-commerce;
• a customs clearance authentication server that administers pre-customs clearance information;
• and an administration server that is connected to the customs clearance authentication server and the EC server,
• wherein the administration server includes:
• a means for generating a registration request that includes product information regarding a product;
• a means for transmitting the registration request to the customs clearance authentication server;
• a means for receiving pre-customs clearance information regarding the product from the customs clearance authentication server, the pre-customs clearance information including information on a tariff;
• and
• a means for notifying the pre-customs clearance information to the EC server such that the pre-customs clearance information is displayed together with the product information on a site accessed by the user terminal,
• the customs clearance authentication server includes:
• a means for generating pre-customs clearance information based on the product information, in response to a request from the EC server;
• and
• a means for transmitting the generated pre-customs clearance information to the administration server, and
• the EC server includes:
• a means for transmitting the received pre-customs clearance information along with the product information to the user terminal;
• and
• a means for accepting, from the user terminal, an instruction to circulate a product specified by the product information via customs.