Renal Impairment Study With ASP1941

Inclusion Criteria: * Patient with stable type 2 diabetes mellitus or healthy subject * Subject must have pre-dose estimated Glomerular filtration rate (GFR) values (Modification of diet in renal disease (MDRD) method) at screening of: * \>90 (normal renal function) * 60-90 (mild renal impairment) * 30-60 (moderate renal impairment) * 15-30 (severe renal impairment) * BMI between 25.0-40.0 kg/m2, inclusive * Fasted plasma glucose (FPG) \<11.5 mmol/l (type 2 DM patients) or \>5.6 mmol/l (Healthy volunteers) Exclusion Criteria: * Patients with Type 1 diabetes * Pulse \<40 or \>90; SBP \>160 mmHg; DBP \> 100 mmHg * T2DM patients who are not on a stable regimen for their current medication (1 month or 5 half lives, whichever is longer) to control their disease * Healthy Volunteers: Any of the liver function tests above the upper limit of normal * T2DM: The liver function tests should be within the following ranges: * AST/ALT: \<2 x ULN * Bilirubin: \<1.5 x ULN * Alk Phos: \< 1.5 x ULN * Patients with renal impairment who have a history of a clinically significant illness (other than renal diseases and T2DM and associated clinical symptoms), medical condition, or laboratory abnormality within 3 months prior to screening * Patients with renal impairment who have not been on a stable dose of concomitant medications for at least 2 weeks for at least 2 weeks (or 5 halflives, whichever is longer) and/or for whom dose changes are likely to occur during the study * Patients with T2DM treated with a diet only * T2DM patients with recent evidence (e.g within the last 6 months) of severe hypoglycemia, for example plasma glucose \< 3mmol/l (\<55 mg/dl), help from others to resolve the hypo or requiring hospitalization * T2DM patients with a Hemoglobin value \< 9 g/dl (5.6 mmol/l)