  The three moments of inertia associated with the wobbling mode built on the
triaxial superdeformed states in Lu--Hf region are investigated by means of the
cranked shell model plus random-phase approximation to the configurations with
aligned quasiparticle(s). The result indicates that it is crucial to take into
account the direct contribution to the moments of inertia from the aligned
quasiparticle(s) so as to realize \mathcal{J}_x > \mathcal{J}_y in
positive-\gamma shapes.
