WorldSIMTravel eSIM
Japan eSIM · 10GB
- 10GB data, valid 30 days
- Instant eSIM, no physical SIM needed
- Keep your UK number on your main SIM
From£7.78one-off payment · valid 30 days
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Japan eSIM deals
Popular with UK travellers heading to Tokyo, Kyoto and Osaka. Get mobile data from £7.78 with an eSIM you set up before you fly, with no roaming bills and no hunting for a local SIM.
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WorldSIMWorldSIMTravel eSIM
Japan eSIM · Unlimited
- Unlimited data, valid 7 days
- Instant eSIM, no physical SIM needed
- Keep your UK number on your main SIM
From£12.67one-off payment · valid 7 days
See deal
Roaming vs eSIM: a week in Japan
What a week of mobile data costs on UK network roaming, compared with the cheapest eSIM below.
- Vodafone£56
- EE£56
- eSIM from£7.78
Save up to £48.22 on a week away. See the full UK Roaming Cost Report.
How to use an eSIM in Japan
- Check your phone supports eSIM and is unlocked. Look for "Add eSIM" in your phone's settings.
- Buy and install before you go. Scan the QR code on Wi-Fi at home a day or two before you travel.
- Switch it on when you land. Set the eSIM as your mobile data line and keep your UK SIM on for calls and texts.
Japan eSIM FAQs
How much data do I need for a week in Japan?
For maps, messaging and social media, 5–10GB is plenty for a week. If you'll stream video or use your phone as a hotspot, go for an unlimited plan where one is available.
Will I still get calls and texts on my UK number?
Yes. Keep your normal SIM switched on and you'll receive calls and texts as usual. Your UK network may charge for these abroad, so check their roaming rates.
Is an eSIM cheaper than roaming?
Usually, yes. UK networks often charge daily roaming fees outside Europe, while a travel eSIM is a single one-off payment for the whole trip.
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