Japan Travel eSIM
Fast 4G/5G coverage via NTT Docomo / SoftBank. Instant QR activation, no SIM swap.
Plans starting from
- ✓Daily unlimited data (most plans)
- ✓QR code emailed in ~30 sec
- ✓4G/5G high-speed network
- ✓7-day refund if unactivated
Japan eSIM plans
10 plans from 1-day to 10-day. Pick the duration that matches your trip.
Validity: 1 days
Plan
Japan 1 Day
≈ HK$20 / day
Validity: 2 days
Plan
Japan 2 Day
≈ HK$15 / day
Validity: 3 days
Plan
Japan 3 Day
≈ HK$13 / day
Validity: 4 days
Plan
Japan 4 Day
≈ HK$12 / day
Validity: 5 days
Plan
Japan 5 Day
≈ HK$12 / day
Validity: 6 days
Plan
Japan 6 Day
≈ HK$11 / day
Validity: 7 days
Plan
Japan 7 Day
≈ HK$11 / day
Validity: 8 days
Plan
Japan 8 Day
≈ HK$12 / day
Validity: 9 days
Plan
Japan 9 Day
≈ HK$11 / day
Validity: 10 days
Plan
Japan 10 Day
≈ HK$12 / day
eSIM cannot be refunded once installed on device
Japan Network Coverage
Direct partnership with top local carriers — not an MVNO reseller.
Carriers
- NTT Docomo
- SoftBank
- KDDI au
- Rakuten Mobile
Network Tech
Bands: B1 / B3 / B8 / B18 / B19 / B28 / n78 / n79
Typical speed: 30-150 Mbps urban; 15-50 Mbps rural
5G widely available in Tokyo / Osaka / Kyoto / major cities; rural coverage strong on 4G LTE (B18/19/28).
6 reasons to use ALT eSIM in Japan
Operated by a Hong Kong team. Running on Shopify as altsimcard.shop since 2024; self-hosted altesim.com passes the savings to you.
30-second delivery
QR code emailed instantly after Stripe payment — no shipping wait.
4G / 5G speeds
Top local carriers: Docomo, SoftBank, T-Mobile, Vodafone, and more.
Keep your number
eSIM runs alongside your physical SIM — keep receiving SMS on home line.
Stripe secured
Visa, Mastercard, Apple Pay, Google Pay — PCI-DSS Level 1 checkout.
HK-based support
WhatsApp & email in Cantonese / Mandarin / English — real humans.
Zero plastic
No physical card to manufacture or ship — lower carbon footprint.
How to install and activate the eSIM
Takes 2-3 minutes. Do it on home Wi-Fi before departure.
Choose plan & pay
Visa / Mastercard / Apple Pay / Google Pay
Receive QR code email
Arrives in your inbox within 30 seconds of Stripe confirmation
Install on Wi-Fi
iPhone: Settings → Cellular → Add eSIM; Android: Settings → Connections → SIM Manager
Enable on arrival
Turn on Data Roaming when you land
As featured on
What travellers say
「Used in Japan for 5 days — Docomo signal full bars on arrival, half the airport SIM price.」
— Chan from HK
「Bangkok solo trip 7 days, 3GB was enough, install was super simple.」
— Lam from TW
「Family Europe trip 15 days — multi-country plan, no need to swap between countries.」
— Wong from HK
Japan eSIM FAQ
8 most common questions. WhatsApp us if anything's missing.
Which carrier network does the Japan eSIM use?▼
Does my phone support eSIM?▼
How do I install? Do I need Wi-Fi?▼
Is it instant? When does the QR code arrive?▼
Can the eSIM make calls or receive SMS?▼
What if I can't connect after install?▼
What's the refund policy?▼
Does unused data carry forward?▼
Ready for Japan?
Pick a plan, receive your QR code in 30 seconds, connect on landing.
View all plans ↑