We present a summary of recent studies on $CP$ violation with the Belle experiment using the final data sample of $772 times 10^{6}$ Bbar{B} pairs produced at the Ypsilon(4S) resonance at the KEK asymmetric e^+ e^- collider. We discuss preliminary measurements of the branching fraction, the polarization and the $CP$ asymmetries of the decay $B^0 rightarrow rho^{+} rho^{-}$ and an updated constraint on the CKM angle $phi_2$ from the $Btorhorho$ system. Being also related to $phi_2$, we present a preliminary measurement of the branching fraction of $B^0rightarrow pi^0pi^0$ decays. Last, a preliminary model independent dalitz plot analysis of the decay $B^0 rightarrow D^0[K_S^0pi^+pi^-]K^{*0}$ is presented and its sensitivity to the CKM angle $phi_3$ is discussed.
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