Japan & South Korea eSIM — reviews & details
Japan & South Korea 1GB/Day · 1 GB/day · 1 days
620 reviews
Coverage & networks
- Japan KDDI/au 5G
- South Korea SKTelecom 5G LG Uplus 5G
Traveller reviews
Ananya M.
UAE · Jan 2026
First time using an eSIM and it was painless. Signal held up well on trains and in rural areas. Will use eSIM TopUp for my next trip for sure.
Anna
GotoeSIM Support
· 7 months ago Thank you so much, Ananya! Love that you were online the moment you landed in Japan & South Korea. — Anna, eSIM TopUp Support
Katya C.
India · Jan 2026
No more hunting for a SIM card kiosk on arrival. Speeds were solid for maps, messaging and browsing. Five stars from me.
Yuki
GotoeSIM Support
· 7 months ago Thank you for the kind words, Katya! Delighted the speeds worked well for you. Safe travels, and see you on your next trip! – Yuki 💜
James L.
Italy · Dec 2025
Decent speeds, though slower than I expected in a few spots.
Diego
GotoeSIM Support
· 7 months ago We're really sorry, James. That's not the experience we want for Japan & South Korea. Reach our team at esimtopup.io/support so we can help right away. — Diego, eSIM TopUp Support
Sophia K.
South Korea · Dec 2025
Decent speeds, though slower than I expected in a few spots. Setup instructions in the app were clear and simple.
Diego
GotoeSIM Support
· 7 months ago Apologies for the trouble, Sophia. We'd love the chance to make this right. Please contact us at esimtopup.io/support and we'll sort it out. — Diego
Sarah R.
Turkey · Dec 2025
Saved me a fortune on my holiday. Ran hotspot to my laptop with no issues. Will use eSIM TopUp for my next trip for sure.
James
GotoeSIM Support
· 7 months ago Thanks a lot, Sarah! Love that you were online the moment you landed in Japan & South Korea. Come back anytime! — James, eSIM TopUp Support
Aisha H.
United States · Dec 2025
Good coverage in the city, a bit patchy in remote areas.
Ingrid
GotoeSIM Support
· 7 months ago Appreciate you sharing this, Aisha. Good to hear it did the job, and we're working to make it even better. Reach us anytime at esimtopup.io/support if we can help. — Ingrid, eSIM TopUp Support
Kenji P.
Switzerland · Dec 2025
Decent speeds, though slower than I expected in a few spots.
Tom
GotoeSIM Support
· 7 months ago Appreciate you sharing this, Kenji. We're constantly optimising speeds and coverage across Japan & South Korea. Any questions, our team is at esimtopup.io/support. – Tom 💜
Aisha L.
Sweden · Dec 2025
Install took me two tries but was fine after that. Speeds were solid for maps, messaging and browsing.
Sara
GotoeSIM Support
· 7 months ago Thanks for the honest feedback, Aisha. Glad it mostly worked for you in Japan & South Korea — we're always improving our coverage. Any questions, our team is at esimtopup.io/support. – Sara, eSIM TopUp Support
Ji-woo F.
Thailand · Dec 2025
Great value compared to roaming charges. I kept my normal number for calls while using this for data. Highly recommend for any traveller.
Ingrid
GotoeSIM Support
· 7 months ago Cheers, Ji-woo! Wonderful to hear it worked smoothly in Japan & South Korea. We're here whenever you travel again. – Ingrid, eSIM TopUp Support
Liam C.
Vietnam · Dec 2025
Did the job without any drama. I kept my normal number for calls while using this for data. Exactly as described — no surprises.
Laura
GotoeSIM Support
· 7 months ago So glad to hear this, Liam! So pleased it saved you from roaming bills. Wishing you many more connected adventures! – Laura 💜
Somchai P.
Portugal · Dec 2025
Bought it the night before my flight — smooth process. Streaming and video calls worked without buffering.
Priya
GotoeSIM Support
· 7 months ago So glad to hear this, Somchai! Great to know the setup was quick and easy. Wishing you many more connected adventures! — Priya, eSIM TopUp Support
Fatima T.
Italy · Dec 2025
Saved me a fortune on my holiday in Japan & South Korea. Coverage was strong even outside the city. Five stars from me.
Priya
GotoeSIM Support
· 7 months ago Thanks a lot, Fatima! Delighted the speeds worked well for you. We're here whenever you travel again. — Priya
Fatima V.
UAE · Dec 2025
Connected the moment I landed in Japan & South Korea. Customer support answered my question quickly.
Anna
GotoeSIM Support
· 7 months ago Really appreciate this, Fatima! So happy the Japan & South Korea eSIM kept you connected. We're here whenever you travel again. — Anna
Haruto R.
France · Dec 2025
Worked fine but took a little while to connect at first.
Laura
GotoeSIM Support
· 7 months ago Thank you for taking the time, Haruto. We're constantly optimising speeds and coverage across Japan & South Korea. Any questions, our team is at esimtopup.io/support. — Laura, eSIM TopUp Support
Marco W.
Switzerland · Dec 2025
Installed in minutes by scanning the QR code. Customer support answered my question quickly. Would definitely buy again.
Tom
GotoeSIM Support
· 7 months ago Cheers, Marco! So pleased it saved you from roaming bills. We're here whenever you travel again. — Tom, eSIM TopUp Support
Frequently asked questions
How much does the Japan & South Korea eSIM cost?
The Japan & South Korea 1GB/Day plan costs $2.03 for 1 GB/day over 1 days, paid once with no hidden fees.
How do I activate my Japan & South Korea eSIM?
Scan the QR code in your phone settings (Cellular/Mobile → Add eSIM) or tap Install in the eSIM TopUp app. Install on Wi-Fi before your trip; it activates when you arrive in Japan & South Korea.
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 & South Korea.
Comments & questions
Marco K. · 1 week ago
How long does the QR code take to arrive after payment?
Beatriz S. · 1 month ago
Does this work on an iPhone 13?
Budi D. · 3 months ago
Will this keep my WhatsApp active with my home number?
Lucas P. · 4 months ago
Is 5G supported or just 4G?
Grace B. · 6 months ago
Thanks, installed with no problems on my Samsung.
Liam L. · 6 months ago
Does the validity start on purchase or on first use?
Beatriz V. · 8 months ago
Which networks does this connect to?
Haruto G. · 9 months ago
Is roaming charged extra or is it all included?
Ryan N. · 9 months ago
Can I use it in nearby countries too?
Ava B. · 10 months ago
Do I need to install it before I travel or after I arrive?
Camila P. · 11 months ago
Can I top up the same eSIM instead of buying a new one?
Sofia B. · 11 months ago
Can I use this for hotspot/tethering?