If you’re traveling to Japan soon, one of the smartest things you can do before you go is set up your mobile data. The second you land in Tokyo or Osaka, you’re going to need Google Maps, and Japan’s train system is amazing but also confusing if you don’t know where you’re going. In this video, I break down what I personally think is one of the best Japan eSIM options right now: Saily. I cover how it works, what it costs, and whether it’s actually worth using instead of expensive roaming or unreliable public Wi‑Fi. I’ve been using Saily for about two years across multiple trips, and it’s been consistent every time. Setup is quick: download the app, pick a plan, and install the eSIM—no physical SIM card needed. Japan plans start at under $4 for 1GB/7 days, with 3GB, 5GB, 10GB, 20GB, and unlimited options depending on your trip length and usage. I also go over the key things to consider (like it being data-only), plus the extra privacy features that stand out to me—ad blocking, web protection, and a virtual location feature that works like a mini VPN—along with app alerts at ~80% usage and 24/7 live chat support.