BAY59-7939 Japanese in Atrial Fibrillation (2nd)

Inclusion Criteria: * Japanese subjects with non-valvular AF who met all of the following criteria: * Persistent or paroxysmal non-valvular AF with \>/=2 episodes before enrollment, at least 1 of which had been verified by ECG recording within 4 weeks before randomization * Male subjects aged 20 years or older and postmenopausal female subjects * Subjects with at least one risk factor for thromboembolism or aged 60 years or older (Risk factor for thromboembolism: hypertension, diabetes mellitus, coronary artery disease, congestive heart failure). Exclusion Criteria: * History or presence of stroke or transient ischemic attack. * History of intracerebral hemorrhage. * History or presence of bleeding at randomization; intraocular or gastrointestinal bleeding within the last 6 months prior to randomization.