The RI Beam Factory is being proposed at RIKEN, which is a project to construct a set of equipment which includes a superconducting ring cyclotron (SRC) and experimental storage rings (MUSES). Heavy ions are to be accelerated to energies of up to 400 A MeV for light nuclei and 150 A MeV for the heaviest nuclei by the SRC and up to 1400 A MeV in the MUSES. Radioactive nuclear beams are to be supplied as secondary beams. Electrons, stable nuclei, and highly charged ions in addition to radioactive nuclei can be stored in the storage rings. The MUSES provide various collision methods, such as colliding, merging, and internal target modes. A few of the new nuclear physics opportunities are discussed.