SecretESIM
Japan eSIM
SecretESIM Japan eSIM: data from €0.56, works on NTT docomo, Rakuten Mobile, KDDI/au. QR in email in minutes. Hotspot on eligible plans. Most fixed-GB plans start on first use abroad. Fair use: 0.5 GB/day at full speed, then slower until the next day. Keep WhatsApp on your home number with Dual SIM.
Works in Japan · NTT docomo · Rakuten Mobile · KDDI/au · SoftBank
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Japan eSIM — FAQ
Does SecretESIM work at Narita or Haneda?
Yes. Install before you fly. After landing at NRT, HND, or KIX, enable the eSIM — data typically joins NTT Docomo, SoftBank, or au KDDI within minutes.
Can I keep WhatsApp on my home number with a Japan eSIM?
Yes. SecretESIM Japan plans are data-only. Keep your physical (or primary) SIM active for WhatsApp calls and SMS, and use the eSIM for mobile data via Dual SIM.
How fast do I get the Japan eSIM QR?
After checkout you receive the QR / SM-DP+ profile by email, usually within minutes. Install over Wi‑Fi before you travel; most fixed-GB plans start on first use abroad.
Does the Japan eSIM support hotspot?
Hotspot / tethering is included on eligible SecretESIM plans — check the plan card before buy. Unlimited plans may apply fair use (FUP) to hotspot as well.
Do I need a pocket Wi‑Fi in Japan?
Most travelers skip rental pocket Wi‑Fi when using an eSIM with hotspot on an eligible plan. Confirm hotspot on the plan card.
Will my WhatsApp number stay the same in Japan?
Yes if you leave your home SIM active for the WhatsApp account and use the Japan eSIM only for data (Dual SIM).
What travelers say about Japan
★★★★★ 5 · 4 reviews · including nearby trips
★★★★★“Bought matching plans for my parents with gift checkout. They scanned the QR at home; I topped them up later from My eSIMs when maps ate the allowance.”
★★★★★“Balkans itinerary with one regional pack plus a local add-on. Not having to hunt kiosks at every border was worth it.”
★★★★★“Installed over Wi-Fi the night before Tirana. Data came up at the airport without swapping plastic. Maps and WhatsApp worked the whole week.”
★★★★★“Used a regional Europe plan across Croatia and Slovenia. One QR, no new SIM at each border. Speeds were fine for navigation and boarding passes.”
Package details
Validity policy
Most Japan fixed-GB plans start on first use abroad — install on Wi-Fi at home without burning days. Unlimited / day-pass style plans may start at install — it is printed on the plan.
Provider activation
After payment you get a QR / SM-DP+ profile by email. Install before you travel. Activation follows the selected plan’s first-use or install rule.
Hotspot & calls
Hotspot / tethering is included on eligible plans (see the card). Fair-use on unlimited applies to hotspot too. Plans are data-only: keep your home number for calls/SMS on Dual SIM.
Top-up eligibility
When the provider allows it, top up keeps the same ICCID — no second QR. Open My eSIMs for eligible options after install.
Fair use: 0.5 GB/day at full speed, then slower until the next day.
How eSIM works in Japan
- 1. Buy a planPick data allowance and validity for your trip.
- 2. Install before you travelScan the QR over Wi-Fi at home — no plastic SIM.
- 3. Land & connectEnable the eSIM for mobile data on a supported network.
Full refund within 14 days if the profile was never installed.
Check the plan card for first-use vs install start rules.
Paysera secure checkout. Cards and bank transfer are chosen there.
Contact support before or during your trip.