A Clinical Study in Patients With Chronic Idiopathic Thrombocytopenic Purpura in R788

Inclusion Criteria: * Japanese patients * Patients diagnosed with idiopathic thrombocytopenic purpura at least 6 months before acquisition of consent * Patients with a platelet count averages \<30000/μL during screening period. Each platelet count should not exceed 35000/μL. * Patients who have used and failed or who were intolerant at least 1 typical regimen for the treatment of ITP before informed consent (with or without splenectomy) Exclusion Criteria: * Patients with thrombocytopenia associated with other disease * Patients with autoimmune hemolytic anemia * Patients with poorly controlled hypertension * Patients with a history or active coagulopathy