Best eSIM for Japan Long-Term Stay: A Complete Guide for 2026

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Introduction: Why Long-Term eSIMs Are a Game-Changer for Japan Expats

When I first moved to Japan, getting a phone plan was one of the most frustrating experiences of my life. I remember sitting in a Softbank store for three hours, being told I needed a residence card, a bank account, a hanko stamp, and basically a blood oath to get a basic mobile plan. Things have changed dramatically since then — especially with eSIM technology.

If you’re planning a long-term stay in Japan — whether that’s a few months on a working holiday visa, a year studying Japanese, or an indefinite relocation — an eSIM can be your best friend. No more waiting for physical SIM cards to arrive, no more confusing Japanese-only contracts, and no more being locked into two-year plans you can’t escape from.

But here’s the thing: most eSIM providers cater to short-term tourists. Finding one that actually works well for a long-term stay? That takes some digging. I’ve spent the last several years testing various eSIM options across Japan — from the neon-lit streets of Shibuya to the rural countryside of Shikoku — and I’m going to share exactly what works, what doesn’t, and what’s worth your money in 2026.

Before you dive into eSIM options, make sure you’ve covered the other essentials on your moving to Japan checklist so you’re not scrambling to figure everything out at once.

Quick Comparison: Top eSIMs for Long-Term Japan Stays in 2026

Ubigi — Best Overall eSIM for Japan Long-Term Stay Without a Residence Card

Ubigi has become my go-to recommendation for people who are in Japan long-term but don’t yet have (or don’t want) a Japanese carrier contract. They operate on the Docomo and SoftBank networks, which means coverage is excellent even in rural areas. I’ve used Ubigi while traveling through Tohoku and barely had any dead zones.

What makes Ubigi stand out for long-term stays is their recurring data plans. Instead of buying a one-off tourist package, you can set up auto-renewal on 10GB, 30GB, or 50GB monthly plans. This effectively gives you a month-to-month mobile plan without any contract, residency requirements, or Japanese language ability needed.

The activation process takes about five minutes. You download the Ubigi app, purchase your plan, scan the QR code, and you’re connected. I’ve done this process at Narita Airport arrivals and had data working before I even cleared customs.

Pros

• No residence card or Japanese bank account required
• Excellent coverage on major Japanese networks
• Monthly auto-renewal plans available
• Easy English-language app and setup
• Can top up data anytime

Cons

• No Japanese phone number included
• Slightly more expensive per GB than Japanese carriers
• Customer support can be slow during peak times
• No voice calling capability (data only)

Airalo — Best Budget eSIM for Extended Japan Stays

Airalo is probably the most well-known eSIM provider globally, and for good reason. Their Japan plans are competitively priced, and they offer a huge range of data packages. For long-term stays, you’d typically buy their larger packages and renew as needed.

I find Airalo works best for people who are fairly light on mobile data — maybe you work from home or a co-working space with WiFi, and you just need data for navigation, messaging, and occasional browsing when you’re out. Their 20GB/30-day plan is very reasonably priced, and you can stack multiple plans on the same eSIM profile.

One trick I’ve learned: buy the regional “Asia” plan instead of the Japan-specific one if you’re planning any side trips to Korea, Taiwan, or Southeast Asia. You get slightly less data per dollar, but the flexibility is worth it if you’re hopping around the region.

Pros

• Very affordable pricing, especially for smaller data packages
• Massive selection of plan durations and data amounts
• Clean, intuitive app experience
• Regional plans available for Asia travel
• Referral credits for savings on future purchases

Cons

• No true monthly subscription model — you rebuy each time
• Speeds can occasionally throttle during peak hours
• Data-only — no phone number or voice calls
• Larger data packages can get expensive for heavy users

Holafly — Best Unlimited Data eSIM for Japan

If you’re someone who streams a lot, does video calls regularly, or just doesn’t want to think about data limits, Holafly is worth considering. They offer genuinely unlimited data plans for Japan, with plan durations from 5 days up to 90 days.

For long-term stays, their 90-day plan is the sweet spot. Yes, it’s a bigger upfront cost, but when you break it down per day, it’s actually quite reasonable. And the peace of mind of never worrying about running out of data while trying to Google Maps your way through the backstreets of Shimokitazawa? Priceless.

The catch? “Unlimited” comes with some fine print. While you genuinely won’t hit a hard data cap, speeds may slow down after heavy usage in a given period. In my testing, this wasn’t a major issue for normal use — browsing, social media, Maps, and even video calls worked fine. Trying to torrent or stream 4K video all day, though? You might notice some throttling.

Pros

• Truly unlimited data — no counting gigabytes
• Plans up to 90 days at a time
• Good speeds for everyday use
• 24/7 customer support via chat
• Simple setup process

Cons

• More expensive than metered plans if you’re a light user
• Potential speed throttling after very heavy use
• No Japanese phone number
• Maximum 90-day plans — need to repurchase for longer stays
• No voice or SMS capability

Linemo (SoftBank) — Best Japanese Carrier eSIM for New Residents

Now we’re getting into the Japanese carrier territory. Linemo is SoftBank’s online-only budget brand, and it’s one of the easiest Japanese carriers for foreigners to sign up with. You’ll need a residence card and a Japanese credit card (or debit card), but the entire signup process is in English and done online.

The Mini Plan at ¥990/month for 3GB is absurdly cheap for what you get — a real Japanese phone number, excellent SoftBank network coverage, and the ability to make and receive calls and texts. The 20GB plan at ¥2,728 is also great value for heavier users.

Having a Japanese phone number is actually a big deal for long-term stays. You’ll need one for things like setting up a bank account, registering for services, verifying your identity for countless apps and websites, and even some rental agreements. This is where international eSIMs fall short, and why I eventually recommend most long-term residents switch to a Japanese carrier. If you’re setting up your finances, check out our Wise Japan review for the best way to handle money transfers alongside your new phone plan.

Pros

• Japanese phone number included
• Incredibly affordable plans starting at ¥990/month
• SoftBank’s reliable nationwide network
• No contract or cancellation fees
• eSIM activation available
• Voice calling and SMS included

Cons

• Requires a residence card (Zairyu Card)
• Needs a Japanese payment method
• Some support content still primarily in Japanese
• LINE-based customer support can be inconvenient

Rakuten Mobile — Best Value Unlimited Plan for Japan Residents

Rakuten Mobile has been disrupting the Japanese telecom market since they launched, and their eSIM support is excellent. Their “Rakuten Saikyo Plan” is beautifully simple: use up to 3GB for ¥1,078, up to 20GB for ¥2,178, or unlimited data for ¥3,278. The pricing adjusts automatically based on your usage each month.

For long-term residents, this flexible pricing structure is fantastic. Months where you’re mostly on WiFi? You pay barely anything. Months where you’re traveling around Japan and streaming constantly? You cap out at about $22 USD for unlimited data. That’s hard to beat.

Rakuten’s network has improved dramatically since their early days. In 2026, their coverage across major cities is solid, and they roam on au’s (KDDI) network in areas where Rakuten’s own towers don’t reach. I still occasionally hit weak spots in very rural or mountainous areas, but for 95% of daily life in Japan, it works perfectly.

Pros

• Flexible pricing that scales with usage
• Unlimited data caps at just ¥3,278/month
• Japanese phone number included
• Free Rakuten Link app for unlimited domestic calls
• Strong integration with Rakuten ecosystem (points, etc.)
• English support available

Cons

• Requires residence card and Japanese payment method
• Network coverage slightly weaker than Docomo/SoftBank in rural areas
• Rakuten Link call quality can be inconsistent
• App-heavy ecosystem can feel overwhelming

IIJmio — Best Budget Japanese Carrier eSIM

IIJmio is the dark horse of Japanese mobile carriers. They’re an MVNO (mobile virtual network operator) that runs on Docomo and au networks, and their plans are some of the cheapest you’ll find in Japan. Their eSIM data-only plan starts at just ¥440/month for 2GB. Yes, you read that right — under five dollars.

For long-term residents who primarily use WiFi and just need a backup data connection, IIJmio is unbeatable on price. Their voice+data plans with a Japanese phone number start at around ¥850/month, which is still cheaper than almost any alternative.

The downside? IIJmio’s website and support are mostly in Japanese. You’ll need some language ability — or a patient Japanese-speaking friend — to navigate the signup and manage your account. It’s not impossible with Google Translate and determination, but it’s definitely less foreigner-friendly than Linemo or Rakuten.

Pros

• Incredibly cheap plans starting at ¥440/month
• Runs on reliable Docomo/au networks
• eSIM support available
• No long-term contract required
• Data sharing between multiple SIMs possible

Cons

• Website and support primarily in Japanese
• Requires residence card for voice plans
• Setup process can be confusing for non-Japanese speakers
• Data speeds may be lower during peak congestion (typical for MVNOs)

Buying Guide: How to Choose the Right eSIM for Your Japan Long-Term Stay

Step 1: Determine Your Residency Status

This is the single biggest factor in your decision. If you don’t have a residence card (Zairyu Card), your options are limited to international eSIM providers like Ubigi, Airalo, and Holafly. If you do have a residence card and a Japanese payment method, the Japanese carrier options (Linemo, Rakuten, IIJmio) unlock much better value and features.

Step 2: Assess Your Data Needs

Be honest about how much data you actually use. If you’re working from home with WiFi, you might only need 3-5GB of mobile data per month. If you’re constantly out and about, streaming, video calling, or using your phone as a hotspot, you’ll want 20GB+ or unlimited.

Step 3: Decide If You Need a Japanese Phone Number

For stays longer than 3-6 months, I strongly recommend getting a Japanese phone number. You’ll need one for:

• Opening a Japanese bank account
• Registering for services like Amazon Japan, Mercari, and food delivery apps
• Two-factor authentication on Japanese websites
• Rental apartment applications
• Doctor’s offices and government offices contacting you

If you’re just here for 1-3 months and have your home country number forwarding or available via WiFi calling, you can probably get by without one.

Step 4: Check Your Phone’s eSIM Compatibility

Not all phones support eSIM. Generally, iPhones from the XR/XS (2018) onwards support eSIM, and most flagship Android phones from 2020 onwards do too. Check your phone’s settings — on iPhone, go to Settings > Cellular > Add eSIM. On Android, go to Settings > Network > SIM cards. If you don’t see eSIM options, you may need a physical SIM card for Japan instead.

Step 5: Consider a Bridge Strategy