In this paper, we have explained the development of mail-order sales at present. Then I compared mail-order salesin Japan and Vietnam. In addition, the advantages and disadvantages of mail-order salesand promotion measures were also introduced.Currently, E-commerceare popular due to the development of the Internet. Mail order is becoming more and more a shopping habit for many people. Mail order is interested in countries all over the world. It has a necessary role in the economy of the 4.0 era. Mail order is popular in developed and developing countries, and because of its convenience, we receive positive feedback from consumers.mail-order salesallows consumers to buy goods anywhere, even at home. Customers have a choice of different products and services. From there, customers compare prices between companies to find the best price.In addition, some countries are helping to develop mailorder salesby exempting transactions via the Internet. Companies can understand consumer needs through mailorder sales.Japan and Vietnam are also popular mail-order activities. Compared to Vietnam, Japan is a developed country and can help Vietnam learn and improve this form

mail-order sales, consumers, Vietnam, Japan, advantages