We report on recent Belle measurements of the $\phi_3(\gamma)$ angle of the CKM unitarity triangle as well as on an ongoing new time-dependent analysis of $B^0 \rightarrow D^* \rho$. Belle II prospects with regards to $\phi_3$ measurements and their comparison to LHCb are also presented.
DOI: https://doi.org/10.22323/1.291.0114
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