Yes, foreigners can absolutely use Rakuten, though the specific services available depend heavily on the geographic region. In countries like the United States, Canada, and various European nations, anyone can sign up for the free Rakuten cash-back rewards portal and use its browser extension to save money at thousands of major retailers. In Japan, while foreigners living in the country can access the full ecosystem—including e-commerce, banking, and mobile plans—certain services may require local residency documentation, valid Japanese identification, or Japanese bank accounts for full registration, compliance, and regulatory identity verification purposes.