BuddySIM eSIM Japan 2026: Promo Code, Data Plans & Prices

Yes. Use our code SPOTTER20 when you buy a Japan plan. It takes 20% off. Enter it at checkout.

The cheapest BuddySIM eSIM for Japan costs $5.59 and gives you 1 GB for 7 days. We recheck prices daily, so this price is up to date. You can buy it on the official BuddySIM site.

Yes, BuddySIM works in Japan on its Japan-only plans and on its global eSIMs. If your eSIM is installed but won't connect after you land, open your phone's settings and turn on data roaming for it. Your home SIM can stay as it is.

For Japan alone, these are BuddySIM's lowest prices by trip length:

• 7 days: $5.59 for 1 GB
• 15 days: $10.06 for 2 GB
• 30 days: $12.30 for 3 GB

No, BuddySIM has no unlimited plans for Japan, so every plan comes with a set amount of data.

BuddySIM is an eSIM store for travelers, with plans covering 194 destinations. On Trustpilot, 236 people have rated it 4.4 out of 5.

With BuddySIM, 1 GB in Japan can cost as little as $1.57, on the plan with 50 GB for 30 days.

Yes, in most countries you can share your data through a personal hotspot, though it uses up your data faster. Some countries or plans restrict it, so check the plan details before you buy.

No, BuddySIM's Japan plans are data only, so your home number stays on your main SIM. You can still call and message people through WhatsApp or other apps.

Yes, you can install it at home, but activate it within 60 days of buying it on buddysim.com. The days start counting once the eSIM first uses data on a network in Japan.

Yes, you can top up a BuddySIM eSIM in the BuddySIM app, with no need to install it again.

Yes, BuddySIM has 6 global plans starting at $22.37. These keep you online as you cross borders. But if you're only going to Japan, a Japan-only plan costs less. For example, 10 GB for 30 days is $24.61 on the Japan eSIM and $145.50 on the global one.