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Browse destinationsStart with your actual days in Japan and South Korea
For Japan and South Korea, picture the first hour before choosing a plan: transfer details, directions, a booking and the person waiting for an update. Then check each extra stop by name instead of assuming nearby coverage. Choose the range you would still be comfortable with on a busy day, not just on the day you mostly sit beside hotel Wi-Fi. The ranges below are planning benchmarks, not a promise of what any app will use on your particular phone.
If you are at the point of choosing a plan, our best eSIM for Japan guide compares the current options and the trade-offs that matter for Australians.
The Japan arrival admin, which is not a data problem
For the customs declaration, Visit Japan Web is recommended rather than required. Japan Customs uses the word “recommends” for the electronic route and says the paper declaration form can still be used, which is the opposite of what a lot of travel content will tell you.
Either route can be prepared without relying on mobile data after landing. If you use Visit Japan Web, register at home on wifi and save the 2D code offline before you fly. You present that code at the electronic terminal, so a saved copy is worth more than a browser tab that still has to load in a moving queue.
We went through this properly, including the fake-site warning Japan Customs published in May 2026, in is Visit Japan Web required.
Countries and territories listed for this route
Countries and territories listed when checked: Japan, South Korea. This is the country and territory list checked on 19 July 2026, not a promise for every nearby stop or a future offer. Open the live product coverage list immediately before buying and match every data-needed stop to it.
A practical weekly data budget
| Travel style | Starting planning range | What it normally covers | What can blow through it |
|---|---|---|---|
| Light | 1 to 2 GB per week | Offline maps with occasional live look-ups, messages, email, bookings and transport checks. | Scrolling video, automatic photo backup, app updates and long video calls. |
| Regular | 3 to 5 GB per week | Daily maps, rideshare or transport apps, social browsing, restaurant searches and a few photos. | High-resolution social uploads, hotspotting a laptop and video streaming. |
| Data-hungry | 7 to 10 GB or more per week | Frequent social uploads, lots of navigation, occasional calls and some tethering. | Streaming, cloud backup, large downloads and sharing data with another device. |
What is available when this guide was checked
The currently available options include total-data plans for this route. Match the total allowance to your trip length rather than buying the largest bucket by reflex.
The plan examples below were checked on 19 July 2026. Prices, availability and inclusions can change, so use the product page you can buy today as the final word. Your SIM Shop order email has the exact instructions for the plan issued to you.
| Example plan checked 19 July 2026 | What it includes |
|---|---|
| 1GB data – 7 days | A$8.95; Coverage: confirm the live product-page list |
| 3GB data – 30 days | A$21.95; Coverage: confirm the live product-page list |
| 10GB data – 30 days | A$64.95; Coverage: confirm the live product-page list |
These examples were checked on 19 July 2026, not promised for the future. Open the live product page before paying.
Keep data from disappearing in the background
- Download offline maps and the first accommodation details while still on Wi-Fi.
- Set photo and cloud-backup apps to Wi-Fi only for the trip.
- Turn off automatic app updates and high-quality video autoplay on mobile data.
- If you need to share data with a laptop or another phone, treat hotspot as a separate requirement and check the selected plan’s current note rather than assuming it is included.
Set the phone up only after landing
Buy the plan before travel, but do not scan the QR code, tap a quick-install prompt, install or activate the travel eSIM before you leave. After landing, use airport Wi-Fi only after you can sign in and open a normal webpage. If that does not work, use hotel Wi-Fi or another steady trusted connection, then open the SIM Shop setup email and start. This keeps setup simple when you are tired and travelling.
When you install, choose the travel eSIM for mobile data and keep Australian-line data roaming off unless you intentionally use home-carrier roaming. On current iPhone software, the data-line path starts at Settings > Mobile Service > Mobile Data; other iPhones may say Cellular or Mobile Data. The full iPhone, Samsung, Pixel and other-Android routes are in the eSIM install guide.
When the estimate is not enough
Do not assume every eSIM can be topped up or extended. Check the current order details and eSIM status first. If you need help choosing before purchase, email hello@thesimshop.com.au with your destinations, dates and whether you will use hotspot or video. It is much easier to choose a sensible allowance while you still have a coffee and stable Wi-Fi.
Sources and checks
Destination-specific sources checked: 8 September 2026.
Information checked: 19 July 2026.
These links support the device routes and the plan details discussed here. Price, availability, coverage and inclusions can change, so check the current SIM Shop option linked below immediately before buying.
