Late experimental investigations on the filling-control Mott transition are reviewed by taking examples of the perovskite Ti, V, and Mn oxides with controlled one-electron bandwidth. The complex interplay among the spin, charge, and orbital degrees of freedom is laid emphasis to elucidate anomalous features of the barely metallic phase close to the Mott transition point.

PACS numbers: 71.30.+h, 72.15.--v, 75.30.Kz