Japan 5GB 30Days (IIJ) eSIM Reviews & Details — 4.5★

Coverage & networks

Japan NTT docomo 4G

Traveller reviews

All 5★ 4★ 3★ 2★ 1★

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Ava L.

Switzerland · Jan 2026

✓ Verified

Installed in minutes by scanning the QR code. Speeds were solid for maps, messaging and browsing. Telling my friends about this.

Mark GotoeSIM Support · 7 months ago

So glad to hear this, Ava! So pleased it saved you from roaming bills. – Mark, GotoeSIM Support

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Mei P.

Indonesia · Jan 2026

✓ Verified

Bought it the night before my flight — smooth process. The QR code arrived instantly by email.

Emma GotoeSIM Support · 7 months ago

Really appreciate this, Mei! So happy the Japan eSIM kept you connected. We're here whenever you travel again. — Emma, GotoeSIM Support

Frequently asked questions

How much does the Japan eSIM cost?

The Japan 5GB 30Days (IIJ) plan costs $4.32 for 5 GB over 30 days, paid once with no hidden fees.

How do I activate my Japan eSIM?

Scan the QR code in your phone settings (Cellular/Mobile → Add eSIM) or tap Install in the GotoeSIM app. Install on Wi-Fi before your trip; it activates when you arrive in Japan.

Will this eSIM work on my phone?

It works on any eSIM-compatible, carrier-unlocked phone — iPhone XS and newer, Google Pixel 3 and newer, and recent Samsung Galaxy models.

Can I keep my regular number?

Yes. The eSIM runs alongside your normal SIM, so you keep your number for calls and texts while using data in Japan.

Comments & questions

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Carlos H. · 2 months ago

How do I check how much data I have left?

Tom GotoeSIM Support

You can check remaining data anytime in the GotoeSIM app under My eSIMs, Carlos. — Tom

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Liam V. · 3 months ago

Which networks does this connect to?

Grace GotoeSIM Support

You'll be on top local networks, Liam — full details are on the plan page under Coverage. — Grace

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Liam D. · 3 months ago

Is roaming charged extra or is it all included?

Ken GotoeSIM Support

Roaming is included in the plan, Liam — no extra charges, it's all prepaid. — Ken, GotoeSIM Support

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Lea K. · 4 months ago

How long does the QR code take to arrive after payment?

Mark GotoeSIM Support

Your QR code arrives instantly, Lea — within seconds of payment, by email and in your account. — Mark

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Arjun T. · 4 months ago

Do I need to install it before I travel or after I arrive?

Omar GotoeSIM Support

Install on Wi-Fi before you fly, Arjun — it switches on when you land. — Omar

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James T. · 5 months ago

Is 5G supported or just 4G?

Yuki GotoeSIM Support

5G is available where covered, James — you'll always get the best speed on offer. — Yuki, GotoeSIM Support

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Katya M. · 5 months ago

Does the validity start on purchase or on first use?

Priya GotoeSIM Support

Validity usually starts when you first connect in your destination, Katya — not at purchase. – Priya, GotoeSIM Support

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Budi T. · 6 months ago

Can I top up the same eSIM instead of buying a new one?

Mark GotoeSIM Support

Yes Budi, you can top up the same eSIM anytime — no need to buy a new one. – Mark, GotoeSIM Support

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Grace S. · 8 months ago

Great guide, the setup steps were really helpful.

Diego GotoeSIM Support

So glad it helped, Grace! We're always here if you need anything. — Diego

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Mei V. · 1 year ago

Thanks, installed with no problems on my Samsung.

Sara GotoeSIM Support

It works great on modern Samsung phones, Mei! Add it via SIM manager and you're set. – Sara, GotoeSIM Support

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Chloe M. · 1 year ago

Can I use it in nearby countries too?

James GotoeSIM Support

For nearby countries, Chloe, a regional plan may suit you better — happy to help you pick. – James 💜

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Grace D. · 1 year ago

Can I use this for hotspot/tethering?

David GotoeSIM Support

Tethering is supported, Grace! Feel free to hotspot to your other devices. – David, GotoeSIM Support