Unlimited Data eSIM for Japan - 25 Days
True unlimited 5G/4G data across Japan for 25 days, on KDDI's native network. Delivered as a QR code the moment you pay - install before you fly, switch it on when you land.
- Data
- Included
- Validity
- 25 days
- Network
- KDDI 5G
- Hotspot
- Included
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KDDI
Plan
Unlimited · 25 days
$80.75USD - one-time
$3.23 per day - no contract, no auto-renewal
- QR code emailed instantly
- No ID verification required
- Keep your home number active
Need a different length?
See all Japan eSIM plansEvery duration is its own plan and its own page. Same KDDI network, same instant QR delivery.
What's included
Unlimited data at full speed. No bundle to run down and no daily allowance to watch for the whole 25 days.
Personal hotspot. Share the connection with a laptop, tablet or the people you travel with.
A Japanese IP address. Local apps, maps and streaming behave the way they do for residents.
Automatic setup. The APN configures itself - nothing to type in on arrival.
No ID checks. No passport upload, no registration form, no waiting for approval.
Not included
A Japanese phone number. This is a data-only plan.
Voice calls and SMS. WhatsApp, LINE, FaceTime and Zoom all work over data.
Top-ups. To extend, buy another plan - it installs alongside this one.
Coverage outside Japan. The plan works on Japanese networks only.
Fair use
There is no hard data cap on this plan. KDDI's fair use policy applies to sustained extreme usage, such as continuous tethering of very large downloads.
Plan specification
Everything this eSIM does, in full. Nothing hidden behind a support ticket.
| Plan name | Unlimited Data eSIM for Japan - 25 Days |
|---|---|
| Plan type | Data only |
| Data allowance | Unlimited |
| Throttling | None |
| Validity | 25 days |
| Activation | On first use |
| Install before | 180 days from purchase |
| Billing | One-time, $80.75 |
| Operator | KDDI (au) - Japan |
|---|---|
| Technology | eSIM - 5G / 4G LTE |
| APN | au.5g.au-net.ne.jp |
| APN configuration | Automatic |
| Hotspot / tethering | Supported |
| Data roaming | Supported |
| ID verification (KYC) | Not required |
| Calls / SMS | Not included |
Plan ID AwABAxMAAABKUEstMjVkYXlzLXVuZ2ItYWxs - Product Japan KDDI
Installing this eSIM takes about two minutes.
- 1
Buy and receive the QR
The QR code lands in your inbox seconds after checkout, together with the manual activation codes if you prefer to type them in.
- 2
Scan it at home on Wi-Fi
Settings, then Mobile Data, then Add eSIM, then scan. Install any time within 180 days of buying; the 25 days have not started yet.
- 3
Land in Japan, switch it on
Turn on the line and data roaming. The phone attaches to KDDI automatically and the 25 days begin at that first connection.
Coverage & speed
Native KDDI, not a roaming reseller.
This plan sits directly on KDDI's Japanese network. You get the same signal a local subscriber gets, from central Tokyo to Shinkansen tunnels and rural Hokkaido - with a Japanese IP address rather than a foreign one tunnelled home.
- of the population covered
- 99%of the population covered
- peak measured 5G speed
- 871 Mbpspeak measured 5G speed
- typical latency
- ~32 mstypical latency
Device compatibility
Your phone needs eSIM support and must be carrier-unlocked.
Apple
- iPhone XS / XR and later
- iPhone SE (2020) and later
- iPad Pro 11 inch and Air 3 and later
Android
- Samsung Galaxy S20 and later
- Google Pixel 3 and later
- Most 2022 and newer flagships
Questions about this plan
What does unlimited data mean on the 25-day plan?
There is no bundle to run down and no speed cut at a fixed threshold, so you stay on full 5G/4G for all 25 days. KDDI's fair use policy still applies to sustained extreme consumption, which almost no traveller on a 25-day trip reaches.
When do the 25 days on the Unlimited data eSIM start?
At first use. The 25-day clock starts the moment the eSIM first connects to a Japanese network, not when you pay and not when you install it. You can install the Unlimited data eSIM at home over Wi-Fi days or weeks earlier without losing a single day.
How much does the Unlimited data eSIM for 25 days cost?
$80.75 as a one-time payment, which is about $3.23 per day across the 25 days. There is no contract, no auto-renewal and no deposit, and hotspot tethering is included at no extra charge.
Does the 25-day Unlimited data plan allow hotspot tethering?
Yes, tethering is enabled at no extra cost, so a laptop, tablet or a travel companion's phone can share the connection for the whole 25 days. Because the plan is unlimited there is no shared bundle to watch, only KDDI's fair use policy on sustained extreme usage.
I am travelling in a few months - can I buy the 25-day Unlimited data eSIM now?
Yes. The QR code stays valid for 180 days from purchase, and the 25-day validity only starts when the Unlimited data eSIM first connects to a network in Japan. Buying months ahead of your trip is fine.
Do I need to configure an APN for the 25-day Unlimited data eSIM?
No. The Unlimited data eSIM configures itself when it attaches to KDDI, so there is nothing to type in on arrival. If your device ever asks during the 25 days, the APN is au.5g.au-net.ne.jp.
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Read guideUnlimited data for your 25 days in Japan.
$80.75, one payment, QR code by email. Install tonight, connect the moment you land.