  Belle II is a major upgrade of the Belle experiment and will operate at the
$B$-factory SuperKEKB in Japan. Here we discuss the expected sensitivity of
Belle II for $D^0 - \bar{D}^0$ mixing and $CP$ violation measurements in the
charm sector, which will benefit from a factor 50 increase in statistics and an
improved vertex detection and particle identification. The impact on the
determination of CKM parameters from the measurements of purely leptonic $D$
mesons decays is discussed. Finally a novel method of flavour tagging to
substantially increase the sample of $D^0$ and $\bar{D}^0$ is presented.
