Missed Your Chance to Buy a SIM at the Airport? No Problem! The Complete Guide to eSIM and SIM Cards at Family Mart [2026 Latest]

For Travelers Who Couldn't Get a SIM at the Airport

You’ve just touched down at Narita or Haneda, only to find the SIM card counters backed up with massive lines. Maybe you gave up after seeing the wait, or perhaps your Pocket Wi-Fi rental fell through. Many travelers find themselves wondering, "How am I actually supposed to get online?" for the first time after they’ve already left the terminal.

The good news is that you can buy eSIMs and physical SIM cards at local convenience stores all over Japan. Specifically, Family Mart began selling eSIMs via their in-store "Multi-Copy" machines at approximately 16,400 locations nationwide in November 2025. Today, it’s easier than ever to pick up a SIM or eSIM along with a physical card. You don't need to head back to the airport or go on a hunt for a specialized tech shop—you just need to walk into the nearest Family Mart.

In this article, we’ll provide a clear breakdown of the prices, purchase steps, and setup methods for the eSIMs and SIM cards available at Family Mart. Plus, later in the post, we’ll introduce an even better eSIM option that you can buy right now from your phone without even stepping foot in a convenience store.

Which is Better? Convenience Store SIM vs. Pocket Wi-Fi

What is the SIM/eSIM Sold at Family Mart?

The SIM and eSIM products sold at Family Mart are part of the "Japan Travel SIM" series provided by IIJ (Internet Initiative Japan). IIJ is one of Japan’s leading internet service providers and is a highly trusted name in the industry.

Japan Travel SIM is a prepaid data-only service designed primarily for international tourists and residents returning temporarily. It utilizes NTT Docomo’s 4G (LTE) network, ensuring stable data coverage across vast areas of Japan. While it does not support voice calls or SMS, its simple, data-focused design makes it a favorite among travelers.

The plans are valid for 30 days from the date of activation. There are seven different data tiers ranging from 3GB to 55GB, allowing you to choose the plan that best fits your travel style.

Price List: Same Price for eSIM and Physical SIM

Quick Advice on Choosing a Plan

If you mainly use your phone for sightseeing, social media, and Google Maps, the 10GB Plan (¥3,280) offers the best bang for your buck. For those planning to stream video or stay long-term, we recommend 25GB or higher. For a typical 2-week vacation, the 15GB Plan (¥3,480) is usually just right.

eSIM vs. Physical SIM: Which Should You Choose?

While the prices are the same for both, they serve different needs.

• eSIM: A digital SIM that allows you to download your cellular plan directly to your phone's internal chip. Most recent iPhone and Android models are compatible. It’s popular with travelers because there’s no need to swap tiny cards. If your phone supports Dual SIM, you can keep your home number active while using Japanese data.
• Physical SIM: The traditional card you insert into your phone's tray. This is the best choice for older devices that don't support eSIM or for travelers who prefer a tangible, plug-and-play setup.

How to Buy and Set Up Your eSIM at Family Mart

At Family Mart, you don't buy these "off the shelf." Instead, you use the in-store Multi-Copy machine.

1. Apply via Multi-Copy Machine: Select "Purchase Prepaid" → "Mobile/Communication" → "Japan Travel SIM."
2. Select Plan: Choose either eSIM (Digital) or Physical SIM and select your data capacity to print an "Application Voucher."
3. Pay at the Register: Take the voucher to the cashier and pay. They accept cash and most cashless payment methods.
4. Receive Your Code: After paying, the clerk will give you a printout with your "Entry Code."
5. Register Online: Connect to Wi-Fi, access the dedicated website, and enter your code to complete registration.
6. Setup: Download the eSIM profile (for iPhone, go to "Settings" → "Cellular" to add). For physical SIMs, simply insert the card.
7. Activation: Switch your cellular data to the new line, and you’re set! The whole process usually takes 15–30 minutes.

Troubleshooting: If You Can't Connect

If you've finished the setup but can't get online, try these steps in order:

• Ensure the eSIM/SIM line is toggled to "On" in your settings.
• Check that your phone is set to use the new line for "Cellular Data."
• Make sure "Data Roaming" is enabled (many international SIMs require this to function).
• Give your phone a quick restart—this fixes almost everything.

■ Frequently Asked Questions (FAQ)

Q: Will Family Mart staff help me set up the SIM on my phone?

A: No, staff cannot provide technical support for smartphone settings. You will need to handle the setup yourself.

Q: Does the SIM come with a Japanese phone number?

A: No, this is a data-only service. It does not support voice calls or SMS.

Q: Can I pay with a credit card?

A: Yes, you can pay at the register using cash, credit cards, or various cashless mobile payments.

Q: Can I top up (add more data) if I run out?

A: No, these plans do not support top-ups. We recommend choosing a plan with slightly more data than you think you'll need.

Q: Are they available at every store?

A: eSIM purchases require the "Multi-Copy" machine. Please note that a small number of stores without this machine cannot process eSIM sales.

Q: Do I need Wi-Fi for the setup?

A: Yes, you will need a temporary Wi-Fi connection to download the eSIM profile and register the service.

Q: Who do I contact for help with a Family Mart SIM/eSIM?

A: You can contact the IIJ Support Center (03-5205-4999 / 9:00 AM – 7:00 PM). They are open year-round and offer support in English, Japanese, and Chinese.