About 5 GB for a week in Japan
| Option | 7 days | |
|---|---|---|
| O2 UK, about 5 GB for 7 days | 7 × O2 Travel Bolt On · uses your plan's UK allowance | £49.00 |
| O2 UK, included plans | Included in some plans | Included in plan |
| eSIM For U, 5 GB for 30 days | See eSIM plans | £7.09 |
| eSIM For U daily plan, 7 days | 1 GB per day | £7.99 |
Official price list of O2 UK, checked 3 Nov 2026. Standard plans; older contracts may differ. Source Prices in different currencies, not converted.
All O2 UK data options for Japan
| Data | Valid | Price | |
|---|---|---|---|
| O2 Travel Bolt On | Plan data | per day | £7.00 |
| O2 Travel Inclusive Zone Ultimate | Plan data | Included in plan |
In the O2 UK price list, O2 Travel Inclusive Zone Ultimate covers Japan and 30 other named destinations, among them USA, Turkey, and Thailand, all at the same O2 UK prices. Our eSIM prices are live.
Good to know before you travel to Japan
- Free Wi‑Fi is common in stations, convenience stores and cafés, but it usually needs a sign-up. Good as a backup, not as your main connection.
- Google Maps shows train and subway connections with fares, which makes the rail network in Tokyo and Osaka much easier to use.
eSIM plans for Japan
- Networks for JapanKDDI/au, NTT docomo, Rakuten Mobile and SoftBank
- SpeedUp to 5G on all four networks. Where there is no 5G, you connect over 4G/LTE.
- Internet runs viaSingaporeDepending on the plan. Banking or streaming apps may treat you as being there.
Questions and answers
How much does O2 UK charge for data in Japan?
The table shows the cheapest official O2 UK option for about 5 GB in a week, every O2 UK data option for Japan, and the source with the date we checked it.
Is Japan included in O2 UK plans?
In some plans. O2 UK lists Japan in a zone that some plans include; otherwise the options in the table apply.
Can I keep my O2 UK number in Japan?
Yes. In Japan, keep the O2 UK SIM for calls and texts and use the travel eSIM for data. Turn off data roaming on the O2 UK line so it does not use data.
Where can I see all O2 UK roaming charges?
On the O2 UK roaming charges page, with every destination in the O2 UK price list.
Updated 3 Nov 2026 · checked against our live catalogue
How we check our data · Prices and plans come live from our catalogue; facts come from official sources, listed where we use them.