Konnichiwa, Japan.Japan
eSIM.
Hello, traveler. — Plans from $0.75
Stay connected across Japan with 4G/LTE and 5G coverage on NTT Docomo, Softbank, and au — three of Asia's most reliable networks. Works in Tokyo, Osaka, Kyoto, Hiroshima, and every Shinkansen corridor. Coverage extends to rural hiking trails and most remote islands. Activates instantly, no local registration required.
Choose your plan
eSIM in 3 steps for Japan
Pick data amount and validity. Pay with card, Apple Pay, or Google Pay.
We email a QR code instantly. Scan it in Settings — installed in under 60 seconds. No app needed.
Your phone connects to local networks automatically when you arrive. No SIM swap, no kiosk. Hotspot included.
Coverage & connectivity.
Japan operates one of the world's densest and most reliable mobile networks. NTT Docomo covers 99.9% of the population with 4G/LTE and has aggressively deployed 5G across all major cities since 2020. SoftBank and au fill regional gaps, ensuring continuous connectivity even in the Japanese Alps and remote Hokkaido fishing villages. Shinkansen bullet-train routes between Tokyo, Osaka, and Fukuoka maintain near-uninterrupted 4G — ideal for remote work on the move. Underground subway systems in Tokyo and Osaka have full in-tunnel coverage throughout. All major airports including Narita, Haneda, and Kansai International deliver high-speed LTE from the arrival gate. Rural mountain areas such as the Nakasendo trail and Nikko have reliable 4G at trailheads, thinning to 3G in deep gorges.
Questions about Japan
What speeds can I expect in Japan?
4G/LTE up to 150 Mbps in cities; typically 30–80 Mbps in suburban and rural areas. 5G available in Tokyo, Osaka, and other major cities with speeds exceeding 500 Mbps.
Does this work on the Shinkansen bullet train?
Yes. All major Shinkansen routes (Tokaido, Sanyo, Tohoku) have near-continuous 4G/LTE coverage. Brief signal dips occur inside very long tunnels.
Can I use this eSIM in rural Japan and hiking areas?
Yes. Japan has excellent rural coverage. Main hiking trails in Nikko, Hakone, and the Japanese Alps have 4G at trailheads. Remote mountain ridges above 2,000m may drop to 3G.
Is there a daily data fair-use limit?
Daily Unlimited plans throttle to 1 Mbps after the daily quota (e.g., 2 GB/day). Fixed plans have no throttle — your allocation is valid for the full plan period.
What if my data runs out mid-trip?
Top up from your account dashboard at any time. Top-ups apply instantly — no need to buy a new eSIM.
What is an eSIM?
An eSIM (embedded SIM) is a digital SIM built into your phone. Instead of a physical card, you scan a QR code and your plan installs instantly — no SIM tray needed.
Is my phone eSIM-compatible?
iPhone XS (2018) and newer, most Android flagships from 2020+, and all Samsung Galaxy S21+ devices support eSIM. Check our compatibility page for the full device list.
How do I install the eSIM?
After purchase, we email a QR code. On iPhone: Settings → Cellular → Add eSIM → Scan QR Code. On Android: Settings → Network & Internet → SIMs → Add eSIM. The whole process takes under 60 seconds.
Can I keep my regular SIM while using this eSIM?
Yes. Most phones support dual SIM (physical + eSIM). Keep your home number for calls and SMS — use Flysimio for data abroad. You control which SIM handles what in your phone Settings.
Does the eSIM include a hotspot (tethering)?
Yes, all Flysimio plans include mobile hotspot at no extra charge. Share your data connection with laptops, tablets, or other devices freely.
What happens when my data runs out?
You can top up data from your account dashboard at any time. Top-ups are applied instantly — no need to buy a new eSIM or wait.
Can I get a refund?
Yes. We offer a full refund within 14 days of purchase. Contact contact@flysimio.com with your order number.
How long is the eSIM valid for?
You have 6 months from your purchase date to activate the eSIM. Once activated, the plan validity period (e.g., 7 days, 30 days) begins counting down.
Will the eSIM work at the airport when I land?
Yes — as long as you installed the eSIM before your flight, it activates automatically when your phone connects to a local network on landing. No Wi-Fi required for activation.
What if the QR code doesn't scan?
If the QR code won't scan, you can enter the activation code manually — we include both in the email. You can also contact our 24/7 support team and we'll resend or manually provision your eSIM.
