Japan 1GB 7 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 1GB
- Validity
- 7 days
- Hotspot
- Yes
- Technology
- 4G / 5G
Validity starts on first connection at the destination
from$2.90
Japan eSIM
Japan is the destination Thai travellers buy eSIMs for most, because almost every part of the trip runs on maps, train timetables and restaurant bookings. Urban coverage is dense and reaches most subway lines.
Plans listed
12
Network
NTT DOCOMO, KDDI (au), SoftBank, Rakuten Mobile
Technology
4G / 5G
Local currency
JPY
Picked by how you travel
Best for a short trip
Fixed
Best for heavy data
Japan Unlimited 30 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- Unlimited (FUP)
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 4G / 5G
Validity starts on first connection at the destination
from$65.90
Best value per GB
Japan 20GB 30 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 20GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 4G / 5G
Validity starts on first connection at the destination
from$32.90
Best unlimited option
Japan Unlimited 5 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- Unlimited (FUP)
- Validity
- 5 days
- Hotspot
- Yes
- Technology
- 4G / 5G
Validity starts on first connection at the destination
from$12.90
These picks are computed from price per GB, validity and plan features only — never from what we earn.
All Japan plans
Japan Unlimited 15 days (partner)
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- Unlimited (FUP)
- Validity
- 15 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- Unlimited
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$27.90
Sold by PartnerConnect. We earn a commission if you buy through this link. Payment and after-sales support stay with the partner.
Japan Unlimited 30 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- Unlimited (FUP)
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- Unlimited
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$65.90
Japan Unlimited 10 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- Unlimited (FUP)
- Validity
- 10 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- Unlimited
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$22.90
Japan Unlimited 5 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- Unlimited (FUP)
- Validity
- 5 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- Unlimited
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$12.90
Japan 10GB 30 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 10GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- 5G ready
- Hotspot
- Best value per GB
Validity starts on first connection at the destination
from$16.90
Japan 20GB 30 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 20GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- 5G ready
- Hotspot
- Best value per GB
Validity starts on first connection at the destination
from$32.90
Japan 1GB 7 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 1GB
- Validity
- 7 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- 5G ready
- Hotspot
- Budget
Validity starts on first connection at the destination
from$2.90
Japan 3GB 15 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 3GB
- Validity
- 15 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$6.90
Japan 5GB 15 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 5GB
- Validity
- 15 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$9.90
Japan 512MB/day 7 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 512MB per day
- Validity
- 7 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$6.90
Japan 1GB/day 10 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 1GB per day
- Validity
- 10 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$16.90
Japan 2GB/day 15 days
NTT DOCOMO / KDDI (au) / SoftBank
- Data
- 2GB per day
- Validity
- 15 days
- Hotspot
- Yes
- Technology
- 4G / 5G
- 5G ready
- Hotspot
Validity starts on first connection at the destination
from$46.90
How much data you actually need
A typical Japan trip uses about 800MB–1.5GB a day because maps and train apps stay open. If you upload video every night, budget around 2GB a day.
When you land
Main gateways are Narita (NRT), Haneda (HND), Kansai (KIX), Chubu (NGO) and Fukuoka (FUK). Turn the eSIM line on as soon as you land — you normally have service before immigration, which helps if you still need Visit Japan Web.
Where coverage changes
Signal is strong across Tokyo, Osaka and Kyoto including underground. Mountain areas — hiking routes in the Japanese Alps, Shirakawa-go in snow season, and stretches of rural Hokkaido lines — can drop in and out.
Cities travellers ask about
- Tokyo — City-wide coverage including subway stations.
- Osaka — Heavy map use around Namba and Umeda.
- Kyoto — Bus-based city; you will check live times often.
- Hokkaido — Thin patches between towns.
- Okinawa — Beaches and outer islands vary.
Apps to install before you fly
- Google Maps or Yahoo! Norikae for train transfers
- Visit Japan Web for immigration steps
- Tabelog or Google for restaurant bookings
Networks in Japan
| Operator | Technology |
|---|---|
| NTT DOCOMO | 4G / 5G |
| KDDI (au) | 4G / 5G |
| SoftBank | 4G / 5G |
| Rakuten Mobile | 4G / 5G |
These are the networks operating in the country. A given plan may reach only some of them — check the network named on the plan itself.
Plan comparison
| Plan | Data | Validity | Hotspot | Sold by |
|---|---|---|---|---|
| Japan 1GB 7 days | 1GB | 7 days | Yes | eSIMonline |
| Japan 3GB 15 days | 3GB | 15 days | Yes | eSIMonline |
| Japan 5GB 15 days | 5GB | 15 days | Yes | eSIMonline |
| Japan 10GB 30 days | 10GB | 30 days | Yes | eSIMonline |
| Japan 20GB 30 days | 20GB | 30 days | Yes | eSIMonline |
| Japan 512MB/day 7 days | 512MB per day | 7 days | Yes | eSIMonline |
| Japan 1GB/day 10 days | 1GB per day | 10 days | Yes | eSIMonline |
| Japan 2GB/day 15 days | 2GB per day | 15 days | Yes | eSIMonline |
| Japan Unlimited 5 days | Unlimited (FUP) | 5 days | Yes | eSIMonline |
| Japan Unlimited 10 days | Unlimited (FUP) | 10 days | Yes | eSIMonline |
| Japan Unlimited 30 days | Unlimited (FUP) | 30 days | Yes | eSIMonline |
| Japan Unlimited 15 days (partner) | Unlimited (FUP) | 15 days | Yes | Partner (PartnerConnect) |
FAQ
Does an eSIM work on the Shinkansen?+
Yes, though long tunnels interrupt it. If you need an online meeting on board, download what you need beforehand.
Do I need an unlimited plan for Japan?+
Usually not. A 10–20GB plan covers a typical 7–10 day trip; unlimited pays off when you stream daily or tether several devices.
When does a Japan eSIM start counting days?+
Most plans here start when the phone first connects to a network at the destination, so you can install in advance at home and switch it on after landing. Each plan page states its own rule.
Do I have to remove my home SIM?+
No. The eSIM is a second line, so you keep your home number for SMS OTP. Turn off roaming data on the home line and set the eSIM as the data line.
Related
Plan data in this build comes from a demo supplier used to exercise the system. Prices and networks are replaced with live data once a supplier API is connected.
Last updated: September 4, 2026