SIM in Japan: A Guide for Foreign Residents

Why It’s Hard to Get a SIM in Japan

Foreigners often face challenges when applying for a SIM in Japan like:

• Language barriers during the application process
• The need for a Japanese credit card or bank account
• Long contracts with high cancellation fees
• Complicated ID verification

Photo credit: JAL

Fortunately, a few providers now offer simpler options tailored for non-Japanese residents.

Introducing Smiles Connect

Smiles Connect is a reliable and affordable SIM service in Japan, designed especially for migrant workers and foreign residents. Created in response to user feedback from Japan’s No.1 remittance app, Smiles Mobile Remittance, Smiles Connect helps ease the stress of choosing the right mobile plan—something that can often be confusing and overwhelming for non-Japanese speakers.

Photo Credit: Smiles Connect, Smiles Connect booth at Toyota Stadium (June 8, 2025)

Smiles Connect offers a range of flexible SIM plans, including voice-only, data-only, and voice + data options. Customers can choose between a physical SIM card or an eSIM, depending on what suits their phone and lifestyle best.

Switching from another carrier? Smiles Connect makes it easy to keep your existing phone number with Japan’s MNP one-stop process. And if you don’t use all your data for the month, the remaining balance automatically rolls over to the next month—no waste, no extra charge.

Smiles Connect isn’t just about staying connected. It’s about staying close to the people that matter—sharing everyday moments with loved ones, even from far away.

How to Apply for a SIM Card in Japan

Step 1: Choose a Provider

Consider your budget, how much data you need, and whether you want voice calls or a Japanese phone number.

Step 2: Prepare Your Documents

You may need the following:

• Residence card
• Passport
• Japanese address (sometimes required)
• Payment method (credit card, cash, or online payment service)

Step 3: Apply Online or In Person

Some SIM providers, such as Smiles Connect, offer a simple online application in English. In many cases, only your residence card is required. Other providers may ask for additional documents or an in-person visit, often by appointment.

Step 4: Wait for Your SIM to Arrive

Most SIM cards arrive within 2–3 business days. Activation instructions are usually sent to your email or included in the package.

Final Tips

Before choosing a SIM provider, it’s important to consider a few key things. Take time to compare different options—not just in terms of monthly costs, but also the amount of data included, the network provider and whether the plan supports voice calls. Some affordable plans may seem like a good deal until you realize you can’t make regular phone calls or your signal is bad. Being aware of these details will help you find the SIM that truly fits your needs.

If you’re considering a Smiles Connect subscription, you will need to order it through the Smiles Mobile Remittance app.

Smiles Mobile Remittance is Japan’s “absolute number one” mobile money transfer service, trusted by many overseas workers and residents. With just your smartphone, you can send money anytime, anywhere.

The app also lets you easily manage your Smiles Connect SIM—track data usage, monitor your account, and handle payments all in one place.

Smiles offer a fast, safe, and convenient way to support your family. You’ll also enjoy real-time updates, an “Everyday Great Rate,” and reliable customer support, making your remittance and mobile experience simple and stress-free.