Nomad does not provide an eSIM for Japan that includes a local phone number or SMS functionality. The plans it offers for Japan are data‑only, so travelers who need voice or text messages must rely on internet‑based messaging and calling apps.
For most travelers, WhatsApp, Telegram, iMessage and other VoIP services can be used over an internet connection. However, some destinations may block or restrict specific services, so it is advisable to confirm that the apps you plan to use are accessible in Japan before purchasing an eSIM.