Mobile Companion

Companion Mobile is the app that makes staying connected during your trip to Japan effortless. Buy a data eSIM in seconds, install it before you even leave home, and stay connected from the moment you land — no queuing at a store, no physical SIM card to swap. WHY COMPANION MOBILE - Data plans built for Japan (7 or 30 days), on a reliable local network - Instant installation by QR code or direct link, before or after you arrive - Your regular number stays active for calls and texts: the eSIM only handles your internet data - Top up directly from the app if you run out of data during your trip - Track your usage and plan validity at a glance - Home screen widget to check your remaining data without opening the app - Secure payment by card, Apple Pay, or Google Pay - Quick sign-in with email, Google, or Apple - Built-in FAQ and live chat support whenever you need help A JAPANESE IP ADDRESS, REAL BENEFITS With a Companion Mobile eSIM, you browse with a native Japanese IP address: unrestricted access to local services (restaurant bookings, train tickets, Japanese streaming, and more). SIMPLE FROM START TO FINISH 1. Choose your Japan plan (duration and data amount) 2. Pay securely 3. Install your eSIM by QR code, even before you leave 4. Manage, track, and top up your plan throughout your trip Companion Mobile is built for travelers who want reliable connectivity in Japan, without the hassle or surprises.