Three roaming in Japan: what it costs, and when an eSIM is cheaper
Data in Japan is included with Complete. Otherwise, it costs £8.00/day (Daily roaming charge – Go Roam Around the World Extra). An eSIM for 7 days and 6 GB costs from $12.99 (GoMoWorld).
Rates checked on October 21, 2026 in the official price guide · Source: Three
The best eSIMs in Japan for a week
For 7 days and 6 GB
- 1Best unlimited
PlanJapan
Japan specialistUnlimited · 7 days
$33.00$4.71 per day- No daily cap announced
- Network: NTT Docomo
- Hotspot up to 10 GB a day
- 2Cheapest
GoMoWorld
14 GB · 30 days
$12.99$0.93 per GB- Lowest total price for 7 days
- Hotspot allowed
- 3Best price per GB
Orange Travel
20 GB · 14 days
€14.99€0.75 per GB- Lowest price per GB for this trip
- Networks: NTT Docomo, KDDI (au), SoftBank, and Rakuten Mobile
- Hotspot allowed
Three steps, three questions: the best unlimited plan, the cheapest and the best price per GB, from three different providers. How we pick the podium · Affiliate links
Three or an eSIM in Japan: our verdict
Depending on your plan and trip length, at the prices read on October 21, 2026.
If your plan includes Japan
Keep Three
With Complete, data in Japan is included at no extra cost, within your allowance abroad.
Otherwise, with Three
£8.00/day
Daily roaming charge – Go Roam Around the World Extra. For 7 days and 6 GB, expect £42.00.
Affiliate links
Data in Japan with Three: our analysis
What Three’s rate sheet and eSIM prices show, as checked on October 21, 2026.
The right pass for your trip length
- 3 daysGo Roam Around the World Extra pass, 3-day£17.50
- 1 weekGo Roam Around the World Extra pass, 7-day£42.00
- 2 weeksGo Roam Around the World Extra pass, 14-day£84.00
- 1 month10 × Go Roam Around the World Extra pass, 3-day£175.00
Against the cheapest eSIM
Three charges in GBP and the cheapest eSIM is sold in USD: we convert nothing. For a week, expect £42.00 with Three and $12.99 with the eSIM (GoMoWorld).
eSIMs in Japan at a glance
- In Japan, we compare plans from 8 eSIM providers: GigSky, GoMoWorld, Jetpac, Nomad, Orange Travel, PlanJapan, Ubigi, and Yesim.
- The cheapest unlimited plan for a week is from PlanJapan: $33.00 (Unlimited · 7 days).
- Locally, the cheapest prepaid SIM card for a week costs ¥2,980 excl. tax (IIJmio, 6 GB, 30 days); see our SIM card comparison in Japan.
- A pocket WiFi rents from ¥5,280 a week (eConnect Japan); see pocket WiFi rental in Japan.
Three applies the same rate in 10 other destinations we track, including Canada, China, Egypt, India, and Mexico.
Plan by plan
What applies in Japan depending on your Three plan.
What Three’s official rate sheet sets out in Japan, offer by offer. “Included” means at no extra cost, within your allowance abroad: your Three account shows the one on your line.
| Plan or offer | Data in Japan |
|---|---|
| Daily roaming charge – Go Roam Around the World Extra | £8.00/day |
| Complete | Included |
| Go Roam Around the World Extra pass (3-day) | £17.50 for 3 days |
| Go Roam Around the World Extra pass (5-day) | £29.75 for 5 days |
| Go Roam Around the World Extra pass (7-day) | £42.00 for 7 days |
| Go Roam Around the World Extra pass (14-day) | £84.00 for 14 days |
What your trip costs
With the Three roaming rate, against today’s cheapest eSIM, for everyday use.
| Trip | With Three | Cheapest eSIM | The offer |
|---|---|---|---|
| 3 days · 3 GB | £17.50 Go Roam Around the World Extra pass, 3-day | $4.99 GoMoWorld | See the plan |
| 7 days · 6 GB | £42.00 Go Roam Around the World Extra pass, 7-day | $12.99 GoMoWorld | See the plan |
| 14 days · 12 GB | £84.00 Go Roam Around the World Extra pass, 14-day | $12.99 GoMoWorld | See the plan |
| 30 days · 24 GB | £175.00 10 × Go Roam Around the World Extra pass, 3-day | $24.99 GoMoWorld | See the plan |
Affiliate links
Japan with other UK carriers
The same trip with the other UK carriers we track, from their official rate sheets.
Of the 4 UK carriers we track, 2 include Japan in at least one plan: O2 and Three.
O2
EE
VodafoneTurn off Three roaming and use an eSIM
Four settings, before you leave or on the plane.
- 1
Install the eSIM at home
Buy it and scan its QR code before you leave: with most providers, the plan only starts when you first connect at your destination.
- 2
Keep Three for calls
In your settings, keep your Three line for calls and texts, and pick the eSIM for mobile data.
- 3
Turn off Three roaming
On iPhone: Settings › Cellular › your Three line › Data Roaming. On Android: Settings › Mobile networks › Roaming.
- 4
Keep eSIM roaming on
A travel eSIM uses the local networks: its data roaming must stay on.
Three roaming in Japan: your questions
Answered from the Three price guide and today’s prices.
Is data in Japan included in my Three plan?
Yes, with Complete. Otherwise, it costs £8.00/day (Daily roaming charge – Go Roam Around the World Extra).
How much does data cost in Japan with Three?
£8.00/day (Daily roaming charge – Go Roam Around the World Extra), so £56.00 for 7 days and 6 GB. An eSIM covering the same week costs from $12.99 (GoMoWorld), checked on October 21, 2026.
Which Three pass should I get for Japan?
The best Three option depends on how long you stay: for 3 days, Go Roam Around the World Extra pass, 3-day (£17.50); for a week, Go Roam Around the World Extra pass, 7-day (£42.00); for two weeks, Go Roam Around the World Extra pass, 14-day (£84.00); for a month, 10 × Go Roam Around the World Extra pass, 3-day (£175.00).
Three or an eSIM in Japan: which is cheaper?
Three charges in GBP and the cheapest eSIM is sold in USD: we convert nothing. For a week, expect £42.00 with Three and $12.99 with the eSIM (GoMoWorld).
Which UK carriers include Japan?
Of the 4 UK carriers we track, 2 include Japan in at least one plan: O2 and Three.
Which network does an eSIM use in Japan?
Depending on the plan, the 8 providers we compare in Japan list NTT Docomo, SoftBank, KDDI (au), and Rakuten Mobile.
How do I avoid roaming charges in Japan?
Use a travel eSIM for data and turn off data roaming on your Three line. You keep your number for calls and texts.
Can I keep my Three number with an eSIM?
Yes, on an eSIM-compatible phone: your Three line stays on for calls and texts while the eSIM carries the data.
China
India
Indonesia
Singapore
South Korea
Thailand
Vietnam