In the dose-evaluation part, at least 3 subjects will receive ASP2215 at each dose (low, middle, and high) for determination of MTD and/or RED. Treatment of AML in this study is composed of 3 periods of therapy: remission induction, consolidation, and maintenance. The decision of whether or not to proceed to the next dose will be made based on the occurrence of DLT during Cycle 1 of the induction period.