This IDC study is a translation of the Japanese document IDC #JPJ42855418. It presents quantitative and qualitative analyses of the Japan public cloud services market based on information collected until end of January 2018. Growth in the Japan public cloud services market today is driven by the migration from traditional IT. Meanwhile, increased digital transformation–related utilization will be a vital growth accelerator for this market in the future. "Migration from traditional IT to cloud also involves things that could be addressed with existing business practices. On the other hand, digital transformation projects require a new business approach. These are the challenges shared by both IT suppliers and IT buyers," says Satoshi Matsumoto, Japan IT services research director, IDC Japan.