TL;DR: Best eSIMs for Japan in 2025
No matter if you're working from a 24-hour coworking space in Tokyo, exploring temples in Kyoto, or uploading reels from an onsen in Hakone, having reliable data is essential for your Japan 2025 trip. With an eSIM, you can land in Japan ready to go. No plastic SIM cards, no queues at SIM kiosks needed.
What you should know:
✅ Install your eSIM before arriving and activate it upon landing
✅ No roaming charges or physical SIM changing
✅ Most plans are under €20 per week
✅ Reliable across major cities, rural towns, and remote areas
✅ Switch or top up easily using provider apps or portals
We tested multiple providers (Ubigi, Saily, and eSIM4Travel) to be the top eSIMs for Japan in 2025 for short-term or slow-travelling the country.
Why use an eSIM in Japan?
Japan has some of the fastest mobile internet in the world, and eSIMs make it simple to benefit from that. When you're navigating busy train stations or hotspotting for a video call in the countryside, a reliable eSIM keeps you online without wasting time at local stores.
✅ Skip SIM card shops
✅ Activate instantly via app or QR code
✅ Avoid high roaming charges
✅ Strong coverage across all regions
✅ Keep multiple profiles for flexible switching
What is an eSIM?
An eSIM (embedded SIM) is a digital version of a traditional SIM card. You install a virtual profile from your provider, no plastic, no shipping, no waiting. If your phone supports it, all you need is a QR code or app.
Best eSIM providers for Japan
1. Ubigi: Best for fast setup and reliable speed
Ubigi is our top pick for travelers and remote workers who want speed, simplicity, and clear pricing. Their “smart start” feature means your plan only activates once you land, and speeds are consistently strong across Japan.
Why we recommend Ubigi:
- Fast setup via app or QR code
- Plans only activate when you land in Japan
- High-speed data (mostly over 200 Mbps)
- Clear and detailed data usage tracking in the app
- Supports tethering (great for remote work)
- Flexible options: from 500MB to unlimited
2. Saily: Best for privacy & security
Created by the team behind NordVPN, Saily is a great option for travelers who want both speed and security. It’s built for nomads working from cafés and coworking spaces while handling sensitive data.
Why digital nomads use Saily:
- Built-in ad blocker and secure browsing features
- Easy top-up and plan switching in the app
- Coverage across Japan and neighboring countries
- Super responsive live chat support
👉 Get 5% off NOMADWISE5 on your first Saily plan
3. eSIM4Travel: Best price for basic usage
If you just want to stay online for maps, emails, or light work, eSIM4Travel offers some of the most affordable plans. There's no app required, you just purchase and activate via email or browser.
Why travelers choose eSIM4Travel:
- Budget-friendly plans that work nationwide
- No app needed, activation via email or web
- Great for casual users and simple workflows
- Live support available if setup issues come up
👉 See your eSIM4Travel plan
Looking for more options?
Want to compare more eSIMs or find a plan for your next country? Our global eSIM directory has options for backpackers, nomads, and long-term travelers.
👉 Browse all Japan eSIM providers here
How to choose the right eSIM for Japan
- Check your phone: iPhones XR+, Google Pixel 4+, and most recent Android phones support eSIMs
- Know your usage: 1–3GB is fine for light users; 10GB+ if you're hotspotting or streaming
- Traveling further? Consider global or Asia regional plans
- Support matters: Choose providers with live chat or easy-to-follow setup instructions
Quick Setup Guide: eSIMs in Japan
- Confirm compatibility: Search in your settings for the option to add an eSIM
- Choose your plan: Think about what you need the data for, then choose the option that matches your needs best
- Install eSIM: Use the app or scan the QR code, usually this runs automatically
- Test activation: Make sure it connects before leaving your hotel Wi-Fi
FAQ: Using eSIMs in Japan
Do eSIMs work across Japan?
Yes. Top providers like Ubigi and Saily offer stable connections in Tokyo, Osaka, Kyoto, and even rural areas like the Nakasendo Trail.
Are eSIMs available at Tokyo airports?
You can find physical SIMs at Narita, Haneda, or Kansai, but they're often more expensive. With an eSIM, you're ready the moment you land for the best available prices.
How much does an eSIM cost?
Not at all, most plans range between €5 to €20, depending on data size. Some providers offer regional plans that include Japan and nearby countries.
- Ubigi users can save 10% with the code NOMADWISE
- Saily users can save 5% with the code NOMADWISE5
Can I use an eSIM for calls and texts?
Most eSIMs are data-only. It’s best to use WhatsApp, FaceTime, or LINE for calls and messaging.
What if my eSIM doesn’t activate?
I found that it’s best to delete all your old eSIMs before activating a new one to prevent installment issues from the beginning. If you still have a hard time activating your eSIM, providers like Saily and Ubigi offer live chat support. You can usually get help in minutes. Make sure to be connected to the Wi-fi while installing your eSIM.
Can I switch between providers?
Yes, you can store multiple eSIM profiles and toggle between them as needed.
Summary: Best eSIMs for Japan
Whether you're coworking in Tokyo, visiting hot springs in Hakone, or heading to Sapporo for snowboarding, a reliable eSIM is the easiest way to stay connected in Japan.
- Want fast setup and strong speeds? → Go with Ubigi (10% off with code NOMADWISE)
- Prefer extra privacy on public Wi-Fi? → Try Saily (5% off with code NOMADWISE5)
- Need a low-cost option with no app? → Go for eSIM4Travel
👉 Compare all Japan eSIMs providers here
