Belle II: Flavour physics at the intensity frontier

The Belle II detector at the SuperKEKB accelerator at KEK in Japan will probe energy scales beyond the reach of the LHC. By examining flavour-changing processes of particles produced in e+e- collisions it will attempt to resolve some of the outstanding questions in particle physics. In this colloquium, after reviewing the historical significance of flavour physics, I will discuss the physics behind the Belle II experiment and SuperKEKB. In particular its complementary nature to experiments at the energy and cosmological frontiers will be discussed.