- Japanese subjects diagnosed with type 2 diabetes who are: a) on stable OAD monotherapy at a half-maximum dose or below according to the approved Japanese labelling in addition to diet and exercise therapy for at least 30 days prior to screening (week -8) (For metformin only: the maximum dose of 750 mg/day is allowed except for METGLUCO®. For METGLUCO®, the allowable half-max dose of 1125 mg/day must be applied.). 'Stable' is defined as unchanged medication and unchanged dose, or b) on stable diet and exercise therapy for at least 30 days prior to screening (week -2)