To evaluate the pharmacokinetic (PK) characteristics of single and multiple intravenous administration of OPC-61815 in healthy Chinese subjects.~To evaluate the safety of single and multiple intravenous administration of OPC-61815 in healthy Chinese subjects.~To evaluate the pharmacological effect of single and multiple intravenous administration of OPC-61815 in healthy Chinese subjects.
To evaluate the pharmacokinetic (PK) characteristics and pharmacological effect of OPC-61815 in healthy Chinese Male subjects