Japan eSIM with Unlimited Data for 7 Days: 4 Plans Compared by Price (Nov 2026)
Price for 7 days of unlimited data
| Provider | 7 days | Per day | Speed limit after heavy use | Hotspot / tethering | Networks listed |
|---|---|---|---|---|---|
| Ubigi | $25.00 | $3.57 | Not stated on the plan page we checked | Not stated on the plan page we checked | Check plan page |
| Nomad | $25.00 | $3.57 | No daily cap stated on the Japan page | Supported (Nomad FAQ) | KDDI au / SoftBank |
| Airalo | $26.50 | $3.79 | 3 GB high-speed per day, then 1 Mbps (Airalo fair use policy) | Not stated on the Japan page | SoftBank + others |
| Holafly | $27.50 | $3.93 | Not published | Up to 1 GB per day | KDDI and SoftBank |
These are data plans. Holafly says its Japan eSIM is data-only with no local phone number; you can still call through WhatsApp, LINE or FaceTime. If you need a Japanese number, check each provider before you buy.
What "unlimited" really means here
Almost every "unlimited" Japan eSIM has a fair-use rule. The number that matters is how much full-speed data you get before it slows down.
- Airalo gives 3 GB of high-speed data per day. After that, speed drops to 1 Mbps until the day resets. 1 Mbps is fine for maps and messages, but slow for video.
- Holafly does not publish a daily limit for the phone itself, but caps hotspot sharing at 1 GB per day (7 GB over a 7-day plan).
- Nomad says tethering is supported. Its Japan page does not show a daily cap, so check the plan details before you buy.
- Ubigi lists the 7-day unlimited plan at $25. Read the plan's fair-use terms on Ubigi's page before buying.
How much do you actually need? Google Maps, LINE, a few Instagram stories and some browsing usually come to well under 1 GB a day. If that's you, a 3 GB-per-day limit will never kick in.
Which one should you pick?
- Lowest price: Ubigi or Nomad, $25.00.
- You want a clear, published speed rule: Airalo — 3 GB a day at full speed, then 1 Mbps.
- You will share data with a laptop or a partner every day: avoid relying on Holafly's 1 GB-per-day hotspot cap; Nomad states tethering is supported.
Shorter or longer trip?
Prices for the same unlimited plans at other lengths (USD, checked November 14, 2026):
| Provider | 5 days | 7 days | 10 days |
|---|---|---|---|
| Airalo | $17.00 | $26.50 | $34.50 |
| Holafly | $20.50 | $27.50 | $36.50 |
| Nomad | $18.00 | $25.00 | $33.00 |
For 10 days, Nomad ($33.00) is $3.50 cheaper than Holafly ($36.50). For 5 days, Airalo ($17.00) is the cheapest of the three.
What about Saily? Its Japan unlimited plan starts at 15 days ($48.99), with 5 GB a day at full speed and then up to 1 Mbps, so it only makes sense for a two-week trip.
Before you buy
- Check that your phone is carrier-unlocked and supports eSIM.
- Install the eSIM at home over Wi-Fi, but turn it on only when you land.
- Prices change. Check the provider's page on the day you buy.
Where to check the plans
We have not been paid by any provider for this comparison. Some links on this site may become affiliate links in the future; see our affiliate disclosure. We compared published prices and terms; we did not run speed tests.