SAM-315

To assess the safety and tolerability of ascending single oral doses of SAM-315, an investigational drug, in healthy Japanese male subjects.To obtain preliminary pharmacokinetic (PK) and pharmacodynamic (PD) profiles of SAM-315 in healthy Japanese male subjects.

To assess the safety and tolerability of ascending single oral doses of SAM-315, an investigational drug, in healthy adult subjects. To obtain a preliminary pharmacokinetic (PK) and pharmacodynamic (PD) profiles of SAM-315 in healthy subjects and to evaluate the effect of a high-fat meal on the PK of SAM-315, an investigation drug, administered to healthy adult subjects.