Do I need to register my passport to activate this EastESIM in Japan?

No, this is one of the significant advantages of choosing EastESIM for your travels in Japan! Unlike some regions where strict local regulations might require passport registration for physical SIM cards (known as RICA in some countries), EastESIM offers a completely digital and hassle-free activation process. There's no need for mandatory passport or biometric registration when you activate your EastESIM. You can set it up quickly and conveniently, often before you even depart, ensuring you're ready to connect to Japan's excellent networks like NTT Docomo or SoftBank the moment you land, without any bureaucratic delays.