The purpose of this study is to investigate the safety tolerability, and PK profile of K-312 and its metabolites in healthy Japanese and non-Japanese adults.

Inclusion Criteria:

• Subject provides written informed consent before any study-specific evaluation is performed.
• Subject is a healthy adult male or a female of non-childbearing potential between the ages of 18 and 45 years, inclusive.
• Subject has a body mass index of 18.5 to 30 kg/m2, inclusive.
• Subject has hematology, coagulation, serum chemistry, and urinalysis test results within the reference ranges or showing no clinically relevant deviations, as judged by the Investigator.

Exclusion Criteria:

• Subject has the presence of an active or recurring clinically significant cardiovascular, pulmonary, renal, endocrine, hepatic, neurologic, psychiatric, immunologic, hematologic, gastrointestinal, or metabolic disease requiring medical treatment.
• Subject has any surgical or medical condition that might significantly alter the absorption, distribution, metabolism, or excretion of K-312. Cholecystectomy is permitted if there are no postcholecystectomy gastrointestinal symptoms.
• Subject has clinically relevant abnormalities in clinical laboratory parameters.