  We report an improved measurement of D0-D0bar mixing and a search for CP
violation in D0 decays to CP-even final states K+K- and pi+pi-. The measurement
is based on the final Belle data sample of 976/fb. The results are y_CP=(1.11
+- 0.22 +- 0.09)% and A_Gamma=(-0.03 +- 0.20 +- 0.07)%, where the first
uncertainty is statistical and the second is systematic.
