This paper analyzes the mobile retailers in Tokyo that are expected to help customers living at distant locations from retail shops. The location data of mobile retailers were collected through interviews to sales managers and examination on the internet. The data were analyzed based on a Poisson regression model. Analysis and interviews revealed that mobile retailers play a key role in providing shopping opportinities to the people who encounter difficulites in shopping such as distant and elderly people. Mobile retailers also promote social interaction between their customers. Legal regulations, on the other hand, prohibit a wide spread of mobile retailers, which should be resolved by administrations.