IIJ eSIM 2026: Promo Code, Travel Plans, Prices & Data

Yes, the IIJ discount code ESIMSPOTTER gives you a discount on your plan. Enter it at checkout on the MobiMatter website.

You'll also find the code next to every IIJ plan in the table above, with a button to copy it.

IIJ plans start at $5.99 for 5 GB valid for 30 days in Japan. Right now, the best price per GB is $0.60, on the 50 GB Japan plan for 30 days ($29.99).

Prices depend on the country, the amount of data and the number of days. We check prices daily, so these figures are up to date. Sort the table above by price or by price per GB to compare.

Most recent phones work with IIJ, including iPhone XS, XR and newer, Samsung Galaxy S20 and newer, and Google Pixel 2 and newer. iPhones made for China with two physical SIM slots won't work.

Your phone must be carrier-unlocked. For your exact model, see MobiMatter's list of compatible devices.

You buy IIJ eSIMs through MobiMatter, which has an app for iPhone and Android, or you can install from a QR code. On Android, most IIJ plans need the APN set by hand.

No, IIJ eSIMs are data only, with no phone number, calls or SMS.

Use WhatsApp, Viber or Telegram for calls and messages over data. Your own SIM can stay on, so calls and texts to your usual number still reach you.

IIJ has plans for Japan only.

No, IIJ eSIMs bought through MobiMatter can't be topped up, and their days can't be extended.

If you need more data, buy a new plan. It comes as a new eSIM, which you install alongside the old one.

IIJ's own Japan Travel SIM can be recharged with IIJmio coupons, but that only works when you buy directly from IIJ.

Yes, every IIJ plan allows hotspot use. Neither IIJ nor MobiMatter mentions a device limit.

Data your other devices use comes out of the same plan. The plans have no daily cap or throttling, so shared devices get full speed until the data runs out.

Sometimes: you buy IIJ eSIMs through MobiMatter, so MobiMatter's refund rules apply. You can cancel if you haven't downloaded or activated the eSIM and it's within 2 months of purchase, though the operator's fees may apply. On the 12, 15, 35 and 60 GB plans, installing starts the plan.

After that, you only get money back if the eSIM doesn't work and MobiMatter's support can't fix it within 24 hours. Use MobiMatter's troubleshooting form.

Refunds go to your original payment method within 10–45 days.

Yes, you can buy an IIJ eSIM in advance, but you must start using it within 2 months of purchase. When the days start depends on the plan.

On the 5, 10, 20 and 50 GB plans, the days start when you first use data, so you can install at home. On the 12, 15, 35 and 60 GB plans, they start at installation, so install just before you fly or when you land.

On Android, most plans need the APN set by hand.