First, you need to find Japanese suppliers and communicate with them by email.

Confirm the order and make payment abroad through foreign exchange payment.

Let foreign countries prepare documents (wine needs to provide: health certificate, certificate of origin, test report, certificate of production date, foreign language label and translation)

See what terms you have signed with foreign countries, and whether you need to arrange Japanese export customs declaration and shipping. If Japan has it, wait for customs clearance at the destination port, and find an agent to arrange customs declaration and shipping if necessary.

Customs clearance at the port of destination, preparation of materials in advance, and labeling and filing in advance. After customs clearance, it will be sent to commodity inspection for testing, and it will be sold freely after issuing a domestic health certificate.

All the above are personal experiences for reference. If you don't understand, please feel free to contact.