Strictly speaking, DMM is a large sales company in Japan, and it also operates. In fact, you can regard it as a digital distribution platform, which can sell all kinds of digital copyright works, e-books, movies bd, records, games and even av.
There are also three companies under DMM, namely DMM Labo, DMM Securities and DMM override, which are engaged in system development and operation, network marketing, foreign exchange margin trading and commodities? Securities trading, game production and operation.