  We present the first evidence of the decay B- --> tau- nu_tau-bar using 414
fb^-1 of data collected at the Upsilon(4S) resonance with the Belle detector at
the KEKB asymmetric-energy e+e- collider. Events are tagged by fully
reconstructing one of the B mesons in hadronic modes. We detect the signal with
a significance of 4.2 standard deviations including systematics, and measure
the branching fraction to be Br(B- --> tau- nu_tau-bar) = (1.06
+0.34-0.28(stat) +0.22-0.25(syst))*10^-4. We also report results based on 1.86
fb^-1 data collected by the Belle detector at the Upsilon(5S) resonance.
Several exclusive Bs decays Bs --> Ds^{(*)+} pi- (rho-) and Bs --> J/psi
phi(eta) are studied. The Bs meson production is found to proceed predominantly
through the creation of Bs^* Bsbar^* pairs. Upper limits on Bs --> K+K-, Bs -->
phi gamma, Bs --> gamma gamma and Bs --> Ds^{(*)+} Ds^{(*)-} decays are also
reported.
