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.
5G ready Hotspot included Keep your home line 24/7 humans
Change your mind within 7 days and we refund in full — as long as the eSIM is unused or under 100 MB, so you can install it and check it connects first. A plan that genuinely fails is refunded any time. Details.
Pick data amount and validity. Pay with card, Apple Pay, or Google Pay.
02
Scan the QR code
We email a QR code instantly. Scan it in Settings — installed in under 60 seconds. No app needed.
03
Land online in Japan
Your phone connects to local networks automatically when you arrive. No SIM swap, no kiosk. Hotspot included.
Network
Coverage & connectivity.
Networks we run on in Japan
KDDI/au5GNTT docomo5GRakuten Mobile5GSoftBank5G
Your device connects to the strongest available network automatically — no manual setup.
Tokyo Osaka Yokohama Nagoya Sapporo Kyoto Fukuoka Hiroshima
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.
Plan size
How much data do you need?
Pick your travel style and trip length — we'll suggest the right Japan plan, no guessing.
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 7 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.
eSIM in Japan
The complete guide.
Best eSIM for travel to Japan
A great Japan eSIM needs three things: coverage on Japan's dense networks, clear pricing, and instant setup. Flysimio connects to NTT Docomo, SoftBank, and au — the three carriers that blanket Japan with 4G/LTE and 5G, from central Tokyo and Osaka to the Shinkansen corridors and rural Hokkaido. Plans are prepaid with no contract and no roaming surprises, so the price you see is what you pay. Your QR code arrives by email within seconds of checkout and installs in under a minute, every plan includes mobile hotspot at no extra cost, and there's a 7-day money-back guarantee. It's the easy way to skip the airport SIM counter and land in Japan already connected.
How to set up a Japan eSIM (step by step)
Getting online in Japan takes about two minutes. First, confirm your phone supports eSIM — any iPhone from the XS (2018) and most Android flagships since 2020 qualify. Choose your Japan plan on Flysimio and pay with card, Apple Pay, or Google Pay; a QR code lands in your inbox seconds later. On home Wi-Fi before you fly, open Settings → Cellular → Add eSIM on iPhone (or Network & Internet → SIMs → Add eSIM on Android) and scan it — the manual code is included too. Keep your home line as default until you arrive. When you land at Narita, Haneda, or Kansai, your Flysimio line connects automatically to a Japanese network — no kiosk, no physical SIM, no queue.
How much data do you need in Japan?
Most visitors over-buy. For light use — Google Maps, translation apps, messaging, and email — around 300 MB a day is plenty, so a 3–5 GB plan covers a week comfortably. Add social media, photo sharing, and music and you'll want roughly 700 MB a day, making a 10 GB plan ideal for a two-week trip across Tokyo, Kyoto, and Osaka. If you stream on the Shinkansen, video-call, or tether a laptop, plan for 1.5 GB or more per day or choose an unlimited daily plan. Not sure? The data calculator above turns your travel style and trip length into a recommendation — and you can top up mid-trip if you run low.
Using a Japan eSIM on iPhone and Android
Flysimio runs as a second line beside your usual SIM, so you keep your home number for calls and texts while your Japan data flows over the eSIM — standard dual-SIM behaviour on iPhone XS and later and most Android phones from 2018. After installing, set the Flysimio eSIM as your cellular-data line and switch on Data Roaming for that line only; it just lets the eSIM attach to Japanese networks, and there are no roaming fees. Leave your home SIM on for iMessage and calls, or turn it off to avoid your own carrier's charges. If you're not sure your model is supported, check the compatibility page before buying.
Hotspot, calls, and texts on a Japan data eSIM
Every Flysimio Japan plan includes mobile hotspot at no extra cost and without throttling, so you can share your connection with a laptop, tablet, or travel companion and use your full allowance freely — handy on long Shinkansen rides. As a data-only eSIM it doesn't include a Japanese phone number, but that rarely matters: WhatsApp, LINE, FaceTime, and Google Meet handle calls and messages over data, and your home number stays reachable on your primary SIM. You avoid the per-minute roaming charges of a traditional plan while staying fully connected across the country.
Short Japan trips vs. long stays
For a few days in Tokyo or a quick business trip, a small 1–5 GB plan on a 7-day validity is the most economical choice. For a two-week rail journey or a longer stay, a 10–20 GB plan or an unlimited daily option lets you navigate, translate, and stream without watching a meter. Because Flysimio gives you six months to activate, you can buy before you leave home and the validity only starts counting when your eSIM first connects in Japan. There's no contract and nothing to cancel — when the plan ends it simply stops, and you can top up or rebuy for your next trip.
