The short answer
For Japan, gosimless's 10GB / 30-day plan costs £8.99. Airalo's equivalent is around £15.75. That's a 43% saving on the most popular data tier for a 1–2 week trip. If you're buying an eSIM for Japan, that difference is worth knowing about.</p>
gosimless vs Airalo: Japan price comparison (2026)
PLANS | GOSIMLESS | AIRALO | DIFFERENCE |
|---|---|---|---|
1GB / 7 days | £4.49 | ~£3.54 | Airalo cheaper |
3GB / 30 days | £9.49 | ~£6.69 | Airalo cheaper |
5GB / 30 days | £8.99 | ~£9.06 | gosimless cheaper |
10GB / 30 days | £8.99 | ~£15.75 | 43% cheaper |
20GB / 30 days | £13.49 | ~£15.35 | 12% cheaper |
50GB / 180 days | £35.49 | ~£47.00 | 24% cheaper |
The story changes at very small plans (1–3GB) where budget-specialist providers can be cheaper than most. But for the 5GB–20GB range that covers the majority of Japan trips — 1 to 4 weeks of regular use — gosimless is consistently competitive or outright cheapest.
Why is the 10GB plan such good value?
The gosimless Japan 10GB plan is priced identically to the 5GB plan: £8.99 for either. That means if you're buying the 5GB plan and there's any chance you'll need more data, upgrading to 10GB costs nothing extra. It's the obvious choice for most trips.
10GB covers approximately 2–3 weeks of normal travel use: Google Maps navigation, WhatsApp, social media, and the occasional YouTube video on the Shinkansen. Heavy streaming users may want more — but for the typical Japan tourist, 10GB is the sweet spot.
How much data do you actually need in Japan?
1–3 days: 1GB is usually enough if you use Wi-Fi at your hotel
1 week: 3–5GB comfortably covers maps, messaging, and light browsing
2 weeks: 5–10GB depending on how much you rely on mobile data
1 month: 10–20GB for regular use; more if you hotspot a laptop
How to buy a gosimless Japan eSIM
Check your phone is eSIM-compatible and carrier-unlocked
Browse Japan plans at gosimless.app/plans
Select your data size and checkout — takes under 2 minutes
Receive your QR code by email instantly
Scan the QR code in your phone settings before you travel or use the one click install button
Frequently asked questions
Is gosimless cheaper than Airalo for Japan?
Yes, on the 5GB, 10GB, 20GB, and 50GB plans. The 10GB / 30-day plan is 43% cheaper than Airalo's equivalent. For small plans (1–3GB), some budget specialists may be cheaper than both.
Does gosimless work in rural Japan?
gosimless Japan plans use local carrier networks. Coverage is strong in major cities and tourist areas. Very remote areas may have limited connectivity — which is true of all eSIM providers.
Can I use the gosimless Japan eSIM for hotspot tethering?
Yes. All gosimless eSIM plans support mobile hotspot on compatible devices.
When should I activate my Japan eSIM?
Install the eSIM before you travel on Wi-Fi. Your validity period starts on first use.