LINE in Japan: The Main Messaging App, and How to Set It Up (2026)
Updated: 2026-08-25
Is LINE the messaging app used in Japan?
LINE is the messaging app that most everyday coordination in Japan runs through — friends, part-time job group chats, restaurants, hair salons, and even local ward announcements. If you plan to live here, you will almost certainly be asked "Do you have LINE?" within your first week, so it is worth setting up early.
Getting started takes a few minutes: install the app, register with a phone number, verify it with a code sent by SMS, and set a display name. From there you can add friends, join group chats, and follow official accounts for the shops and services you use.
Creating your account
Download LINE from your phone's app store and open it. You will be asked to register a phone number — this is the core of a LINE account, and each number can normally hold one account. LINE sends a verification code by SMS to that number; you type the code back into the app to confirm the line is yours.
After verification you choose a display name (you can change it later) and, optionally, a photo. You can also set a password and link an email address so you can recover the account if you change phones. Take a moment to review the privacy settings during setup — you can decide whether people can find you by phone number or ID.
Adding friends: QR code and LINE ID
There are a few ways to connect. The most common in person is the QR code: one person opens "Add friend" and shows their code, the other scans it, and you are linked instantly — this is what people usually do when they meet. You can also add by LINE ID or, if both people allow it, by phone number.
For groups — a class, a club, a workplace shift chat — someone shares an invite link or QR and everyone joins the same room. Group chats are where a lot of daily life gets organized in Japan, from planning dinner to sorting out who brings what to a gathering.
How businesses and services use it
Many shops and services run "official accounts" on LINE instead of, or alongside, a website. Hair salons take bookings through LINE, restaurants send coupons, and clinics or gyms post schedule changes there. Adding a business as a friend often unlocks a first-visit discount, which is why staff frequently ask you to scan their QR at the register.
A growing number of local governments also use LINE. Some wards let you check garbage-collection days, apply for certain procedures, or receive disaster and weather alerts through an official ward account. What is available varies by municipality, so it is worth searching for your own ward's account once you have an address.
Handy features beyond chat
Beyond text, LINE covers free voice and video calls over data, which many people use to keep in touch with family abroad. Stickers — large illustrated characters — are a big part of how people express tone, and plenty are free. You can also share your location in a chat, which is genuinely useful when meeting someone in a busy area.
There are extra layers many residents rely on, such as sending small amounts of money to friends or paying at some shops, and a built-in news and services tab. You do not need any of these to start; the messaging basics are enough for daily coordination, and you can explore the rest at your own pace.
The one thing you need first
Notice the common thread in setup: registration requires SMS verification to a phone number. That single step is effectively the entry ticket to LINE — and to a lot of other Japanese apps and accounts that verify the same way. Without a Japanese mobile number, you can hit a wall right at the first screen, or find yourself relying on a foreign number that complicates recovery later.
So the practical order is: get a local number and mobile data sorted first, then set up LINE and everything else on top of it. Having your own number from day one means SMS codes arrive smoothly and your account is tied to a line you will keep.
Getting a number and data early
If you are still arranging your phone situation, sorting a Japanese number and data early removes friction from all the app setup that follows. Rakuten Mobile lets you apply online with just your residence card, and an eSIM can activate the same day — usually around five to ten minutes, with no store visit needed.
That means you can land, get connected, receive your SMS verification codes, and have LINE running the same afternoon. It has one simple unlimited plan, and domestic calls are free through the Rakuten Link app, so the number that anchors your accounts is also the one you use day to day.
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