Rakuten Group, a global technology leader with 1.8 billion members worldwide, faced IT challenges such as managing growing user volumes and data while reducing costs and time to market. To modernize its services, Rakuten Ichiba's e-commerce platform required a more agile, flexible, and cost-effective solution to overcome scalability issues and escalating costs. After initially using Oracle RDBMS, the company switched to Couchbase's NoSQL database for its advertisement systems, achieving nearly 100% availability and improved system resilience. With Couchbase, Rakuten reduced total cost of ownership by 20%, eliminated redundant databases, and simplified maintenance tasks. The platform now supports over 70,000 shops with a catalog of over 475 million items, handling spikes in traffic without issues, and enabling global applications to be delivered ahead of schedule.