NTT Docomo
Official maps provide separate LTE and 5G area information. Ubigi lists NTT Docomo on its observed Japan plan.
Official network information ↗DESTINATION CONNECTIVITY GUIDE
Best eSIM options for Japan
Japan has extensive 4G service and expanding 5G coverage through NTT Docomo, KDDI au and SoftBank. A travel eSIM is usually the simplest data option for an unlocked compatible phone, but the underlying network, hotspot allowance and activation trigger still vary by plan.
Pricing checked 15 July 2026Next commercial review due 2026-07-29
JapanJP · East AsiaPRACTICAL RECOMMENDATION
Start with the trip, then choose the plan
For most one- to three-week trips, compare a 10–20 GB fixed-data plan on a named Japanese network. Choose an unlimited-style plan only when high phone usage is worth the higher price and after checking fair-use and hotspot limits.
UNDERLYING NETWORKS
Know which local network you are buying access to
A travel provider is not the network itself. Carrier access can change by package.
KDDI au
Official nationwide area maps cover smartphone and router service. Nomad lists KDDI au among networks on its Japan destination page.
Official network information ↗SoftBank
Official coverage lookup varies by handset, contract, settings and reception conditions. Nomad lists SoftBank among networks on its Japan destination page.
Official network information ↗● A provider's destination coverage does not guarantee access to every Japanese network or to 5G on every package.
● Urban 5G availability should not be treated as universal; LTE remains important on regional routes and indoors.
● Device radio-band support, congestion, terrain and buildings can affect service even inside a published coverage area.
● Travel eSIMs are commonly data-only, so ordinary mobile calls and SMS may remain on your home line and incur roaming charges.
DATED PLAN OBSERVATIONS
Japan eSIM price examples
Observed in USD on 15 July 2026. Starting prices may not represent the data allowance you need; promotions, inventory and terms can change.
| Provider | Plan | Data | Validity | Observed price | Price / GB | Network | Hotspot | |
|---|---|---|---|---|---|---|---|---|
| Ubigi | Japan 10 GB | 10 GB | 30 days | $16.50 | $1.65 | NTT Docomo | Allowed | |
| Nomad | Japan 10 GB | 10 GB | 30 days | $17.00 | $1.70 | KDDI au or SoftBank, plan dependent | Verify plan | |
| Airalo | Japan 20 GB | 20 GB | 30 days | $26.00 | $1.30 | Verify package | Verify package | |
| Holafly | Japan unlimited, 10 days | Unlimited* | 10 days | $36.90 | Not comparable | Verify package | 1 GB per day observed | |
| GigSky | Japan 1 GB | 1 GB | 7 days | $4.99 | $4.99 | Verify package | Verify specialist plan | |
| Maya Mobile | Japan unlimited, 30 days | Unlimited* | 30 days | $49.99 | Not comparable | Verify package | Verify plan |
* “Unlimited” plans may use fair-use thresholds, traffic management or separate hotspot limits. Starting-price claims are not complete plan comparisons and must be checked at the provider checkout.
CONNECTIVITY OPTIONS
eSIM is not the only sensible choice
Choose according to devices, trip length, group size and how much setup you want.
Local travel eSIM
A single-country trip and straightforward pre-arrival setupUsually data-only; network and activation rules are package-specific
Regional Asia eSIM
Japan combined with Korea, China or a wider Asia itineraryCan cost more per gigabyte than a Japan-only package
Visitor physical SIM
Compatible phones without eSIM supportMay require airport or retail pickup, passport checks and physical installation
Pocket Wi-Fi
Groups or several devices sharing one connectionRequires charging, collection or delivery, and return arrangements
Home-carrier roaming
Very short trips where convenience matters more than costPricing and high-speed allowances vary widely by home carrier
BEFORE DEPARTURE
Install without starting the wrong clock
- Confirm that the phone supports eSIM and is network-unlocked before buying.
- Purchase over reliable Wi-Fi and save the QR code, installation instructions and order details offline.
- Install before departure when allowed, but do not assume installation starts the validity period.
- On arrival, select the travel eSIM for mobile data, enable data roaming if the provider instructs it, and keep the home line from using roaming data.
- If service does not connect, restart the phone, confirm the APN, and try the listed network-selection instructions before removing the eSIM.
ARRIVAL POINTS
Major international gateways
Tokyo Haneda (HND)Tokyo Narita (NRT)Kansai International (KIX)Chubu Centrair (NGO)Fukuoka (FUK)New Chitose (CTS)
Airport availability is useful for physical SIMs and pocket Wi-Fi, but stock, hours, price and identity requirements should be checked with the seller.
REMOTE WORK & REGIONAL TRAVEL
Small checks that prevent lost work time
✓ Download offline maps and translation data before leaving airport Wi-Fi.
✓ Keep the provider application, QR code and support details available without mobile data.
✓ Do not delete an installed eSIM while troubleshooting unless the provider confirms it can be reissued.
✓ For laptop work, compare hotspot allowance separately from total phone data.
✓ For rural hiking or island travel, inspect the underlying carrier's map for the specific route rather than relying on a nationwide marketing claim.
OTHER LIVE DESTINATIONS
Continue planning the journey
Compare the local network and registration differences before choosing a regional plan.
RESEARCH THE PROVIDERS
Open a detailed provider profile
Independent comparison disclosure
Some future outbound links may earn Nomad Utilities a commission at no additional cost to you. Commercial relationships do not determine which plan appears, the limitations we publish, or the recommendation for a particular use case.
JAPAN ESIM QUESTIONS
Frequently asked questions
There is no universal winner. Start with the network actually named on the package, then check that carrier's official map for your route. NTT Docomo, KDDI au and SoftBank all publish coverage information, while reception still depends on location, device and congestion.