EN
Saily
10 GB · 30 days
$17.99$1.80/GB
See this planBest eSIM for Japan for Business Travel (2026)
The best eSIM for business travel is not simply the cheapest one. We ranked the published Japan plans with a score tuned for this profile: Saily comes first at $17.99.
Updated September 24, 2026Prices checked September 24, 2026
We may earn a commission if you buy through our links, at no extra cost to you. It never changes the computed ranking. Affiliate disclosure
At a glance
Airalo
Unlimited · 7 days
$26.50
See this planAiralo
10 GB · 7 days
$17.00$1.70/GB
See this planPlans compared for this trip
Plan shown: the cheapest plan of each provider that covers at least 7 days and 7 GB. Tap a column header to sort.
| Provider | Data | Validity | Price | Price/GB | Japanese network | 5G | Hotspot | Score | CTA |
|---|---|---|---|---|---|---|---|---|---|
| Saily | 10 GB | 30 days | $17.99 | $1.80/GB | KDDI/SoftBank | Yes | Yes | 9.6 | View plan |
| Airalo | 10 GB | 7 days | $17.00 | $1.70/GB | SoftBank/KDDI | Yes | Not stated | 9.0 | View plan |
| Yesim | 10 GB | 30 days | $19.20 | $1.92/GB | KDDI | Yes | Yes | 8.7 | View plan |
| Holafly | Unlimited | 7 days | $27.50 | — | KDDI/SoftBank | Yes | Yes | 8.6 | View plan |
| Drimsim | 7 GB | Pay as you go | $93.21 | $13.32/GB | Not published | Not stated | Not stated | 4.0 | View plan |
Detailed ranking
- 1
Saily
Plan for this page: 10 GB · 30 days
9.6/10- Price
- $17.99
- Price/GB
- $1.80/GB
- Networks
- KDDI, SoftBank
- Hotspot
- Yes
Pros
- Unlimited plan available for Japan
- Hotspot allowed
- Two or more Japanese networks published
Cons
- Data only, no phone number
- 2
Airalo
Plan for this page: 10 GB · 7 days
9.0/10- Price
- $17.00
- Price/GB
- $1.70/GB
- Networks
- SoftBank, KDDI
- Hotspot
- Not stated
Pros
- Lowest price on this page
- Lowest price per GB on this page
- Unlimited plan available for Japan
Cons
- Data only, no phone number
- Hotspot policy not stated
- 3
Yesim
Plan for this page: 10 GB · 30 days
8.7/10- Price
- $19.20
- Price/GB
- $1.92/GB
- Networks
- KDDI
- Hotspot
- Yes
Pros
- Unlimited plan available for Japan
- Hotspot allowed
- 5G announced
Cons
- Data only, no phone number
- 4
Holafly
Plan for this page: Unlimited · 7 days
8.6/10- Price
- $27.50
- Price/GB
- —
- Networks
- KDDI, SoftBank
- Hotspot
- Yes
Pros
- Unlimited plan available for Japan
- Hotspot allowed
- Two or more Japanese networks published
Cons
- Data only, no phone number
- 5
Drimsim
Plan for this page: 7 GB · Pay as you go
4.0/10- Price
- $93.21
- Price/GB
- $13.32/GB
- Networks
- Not published
- Hotspot
- Not stated
Pros
- Wide choice of plan sizes
- Dedicated app
Cons
- No unlimited plan for Japan
- Pricier than the page average
What matters here
On a business trip the connection has to work in taxis, stations and meeting rooms, and often feed a laptop. That is why network and hotspot weigh more in this profile than in the others.
Most travel eSIMs for Japan are data only: calls go through Teams, Zoom or WhatsApp, and your usual number stays active on the home SIM for authentication codes.
The comparison uses a one-week trip with at least 7 GB. If you tether a laptop for video calls every day, check the estimator and consider an unlimited plan.
The ranking below explains the weights used for this profile, and the estimator lets you test your own usage.
Keep the QR code or the activation details somewhere you can open offline, in case you need to reinstall the eSIM during the trip.
Guides on this site
How much data do you need?
Pick your trip length and how you use your phone. The assumptions are visible and editable.
Install your eSIM in 4 steps
- 1
Buy the plan before you leave and keep the QR code or the app handy.
- 2
Install the eSIM at home on Wi-Fi. Most plans only start the validity period once the eSIM connects in Japan.
- 3
On landing, switch the eSIM on for mobile data and keep your home SIM for calls and texts if you need them.
- 4
Turn on data roaming for the eSIM line, then check that the phone shows a Japanese network.
Your phone must be carrier-unlocked and eSIM-compatible. Check this in your phone settings before you buy.
Frequently asked questions
Can I use a Japan eSIM for work video calls?
Yes, as long as the plan has enough data; video calls use far more than maps or email. Use the estimator with the heavy usage setting, or choose an unlimited plan that allows hotspot use.
How much data do business travel need in Japan?
With this site’s assumptions, a light user needs about 0.3 GB a day, a medium user 0.8 GB and a heavy user 2 GB. The estimator on this page lets you change these assumptions.
What is the cheapest option for this profile?
For 7 days with at least 7 GB, the cheapest published plan is Airalo at $17.00, checked on September 24, 2026.
Can I share the eSIM data with another device?
Some providers allow hotspot sharing and some limit or do not mention it. The table above shows what each provider publishes; when it says “Not stated”, check the plan page before you rely on tethering.
When should I install the eSIM?
Install it at home on Wi-Fi a day or two before you fly, then switch it on for mobile data when you land. With most providers the validity only starts once the eSIM connects to a Japanese network.
Can I keep my own number while using the eSIM?
Yes. Most phones run two lines at once: keep your usual SIM for calls and texts and use the Japan eSIM for data. Turn off data roaming on your home line to avoid charges.
How we rank
We compare the plans each provider publishes for Japan. We do not rank on personal testing or user reviews. For each provider we take the cheapest plan that covers the need of this page, then compute a score out of 10:
- Price (30%): cheapest plan on the page ÷ this plan’s price × 10.
- Japanese network (35%): 10 if two or more networks are published, 8 for one, 5 if unknown.
- Hotspot (20%): 10 if tethering is allowed, 0 if not, 5 if unknown.
- Options (15%): app, top-up and an unlimited plan for Japan (10 each if yes, 0 if no, 5 if unknown).
At equal score, providers we have a partner link with are listed first. Prices change often, so check the final price on the provider’s site.
Top pickSaily · $17.99See this plan