This is a multicenter, randomized, double-blind, placebo-controlled, parallel-group, superiority study comparing the efficacy and safety of rivaroxaban with placebo for primary prophylaxis of venous thromboembolism (VTE) in ambulatory adult participants, with various cancer types who are scheduled to initiate systemic cancer therapy. The study consists of 3 Phases: Screening Phase (14 Days), double-blind treatment Phase (180 Days) and follow up Phase (30 Days). The duration of participation in the study for each participant is approximately 32 weeks.