Physics potential and prospects at SuperKEKB/Belle II

The Belle~II experiment, being constructed at the KEK laboratory in Japan, is a substantial upgrade of both the Belle detector and the KEKB accelerator. The Belle~II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than the Belle experiment. This large data set will be accumulated with low backgrounds and high trigger efficiencies in a clean $e^{+}e^{-}$ environment and will provide unprecedented sensitivity to new physics signatures in $B$ and $D$ meson decays as well as $\tau$ lepton decays. This talk will review the physics capabilities of this experiment.