Is roaming free in Japan if I'm using my US or UK SIM card, or is EastESIM a more practical solution?

Unfortunately, 'Roam Like at Home' benefits from US or UK SIM cards almost never extend to Japan. Post-Brexit, many UK carriers have reintroduced daily roaming fees for non-EU countries, and US carriers typically charge premium rates for international data. Relying on your home SIM in Tokyo, Osaka, or even Hokkaido will likely result in very expensive charges. EastESIM provides dedicated, affordable plans for Japan, leveraging local networks like NTT Docomo or SoftBank to give you reliable, high-speed data without the worry of unexpected bills. It's the smarter way to stay connected.