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Yesim
5 GB · 30 days
$10.56$2.11/GB
See this planYesim vs Drimsim for Japan (2026)
Yesim or Drimsim for Japan? We compared their published Japan plans for a typical trip of 10 days: price, network, hotspot and options. On today’s prices, Yesim comes out ahead.
Updated September 24, 2026Prices checked September 24, 2026
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At a glance
Yesim
Unlimited · 10 days
$34.57
See this planYesim
5 GB · 30 days
$10.56$2.11/GB
See this planHead to head
| Yesim | Drimsim | |
|---|---|---|
| Plan for this page | 5 GB · 30 days · $10.56 | 5 GB · Pay as you go · $69.84 |
| Price/GB | $2.11/GB | $13.97/GB |
| Score | 9.4/10 | 3.3/10 |
| Networks | KDDI | Not published |
| 5G | Yes | Not stated |
| Hotspot | Yes | Not stated |
| Unlimited | Yes | No |
| Top-up | Not stated | Not stated |
| Phone number | No | Not stated |
| plans | 35 | 10 |
Our verdict by traveler type
Choose Yesim if…
Choose Yesim if you want the choice between a fixed plan and an unlimited one.
- Families
- Solo Travelers
- Business Travel
- Students & Working Holiday
- JR Pass Road Trips
- Digital Nomads
Choose Drimsim if…
Choose Drimsim if you use very little data and prefer paying by use; compare its current per-MB rate on its site.
Plans compared for this trip
Plan shown: the cheapest plan of each provider that covers at least 10 days and 5 GB. Tap a column header to sort.
What matters here
Yesim sells fixed and unlimited plans for Japan, while Drimsim charges data by use instead of selling fixed plans, with prices in euros. That difference drives most of the verdict below.
On networks, Yesim publishes KDDI and Drimsim no partner network. On hotspot, Yesim allows sharing and Drimsim does not state its policy.
The per-profile verdict is computed with the same score as the rest of the site, using each profile’s trip length and data need: that is why one provider can win for a family and lose for a solo traveler.
Prices move often. The table shows the plan each provider sells for the need of this page, at the price published on the date shown at the top.
Once the eSIM is active, turn off data roaming on your home SIM so your usual carrier does not bill background data.
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
Which is cheaper for Japan, Yesim or Drimsim?
For 10 days with at least 5 GB, Yesim costs $10.56 and Drimsim costs $69.84, with prices checked on September 24, 2026.
Which is better for Japan, Yesim or Drimsim?
On our score Yesim comes ahead of Drimsim for a typical trip. The verdict by traveler type shows where the other one wins.
Do Yesim and Drimsim use the same network in Japan?
Yesim publishes KDDI; Drimsim publishes no partner network.
Can I switch from Yesim to Drimsim during my trip?
Yes. Most phones store several eSIMs; install the second one on Wi-Fi and select it as your data line. Only one line can usually carry data at a time.
How do I activate the eSIM when I arrive?
Select the eSIM as your mobile data line, turn on data roaming for it, and wait for a Japanese network name to appear. If nothing happens, restart the phone and check the APN settings shown by the provider.
Top pickYesim · $10.56See this plan