The Belle II detector at the SuperKEKB intensity frontier at KEK in Japan will probe new physics at energy scales beyond the reach of the LHC. By examining flavour changing processes of particles produced in e+e- collisions it will look to solve some of the remaining mysteries of the universe: the striking mass and coupling hierarchy of fundamental matter particles; fundamental sources of matter-antimatter asymmetries; dark matter; and how neutrinos have mass. New interactions and yet unseen particles must exist to explain these phenomena.
In this colloquium, I will discuss the physics behind the Belle II experiment and SuperKEKB, and what we hope to achieve by charting the intensity frontier.