Examination of Plasma Concentrations and Safety in Chronic Kidney Disease Patients Undergoing Hemodialysis

To examine the pharmacokinetics, pharmacodynamics and safety in patients with chronic kidney disease undergoing hemodialysis. * To assess the pharmacokinetics (PK), pharmacodynamics (PD), safety and the effect of hemodialysis on PK of single oral administration of ASP7991 in Part 1. * To assess the safety, PK and PD of repeated oral administration of ASP7991 in part 2.