Advertise on LINE in Japan with Boundless
As an official LINE certified partner, Boundless provides trusted support to global advertisers and agencies in planning, running, and optimizing LINE ads.
LINE Ads campaign management services
We help global companies and their ad agencies run and manage ads on the LINE service. Whether you are a company that is already running ads in Japan or you are interested in entering the Japanese market for the first time, our team can provide the support you need.
LINE is the largest communication and messaging app in Japan
LINE is more than just a messaging app. It's a platform that offers a variety of services that are closely connected to daily life, including news, mobile payments, music, games, shopping, and investments.
LINE has over 97 million monthly active users in Japan (*1), and about 80% of the Japanese population use it (*2).
Advantages
Marketing solutions for reaching Japanese consumers from abroad
We have a long history of success in helping advertisers in a wide variety of industries, including top global Fortune 500 companies.
Cross-border support from the US, Japan and Singapore
Our team of multilingual experts who are well-versed in the Japanese market and trends, will provide you with high-quality support to ensure the success of your campaign.
Scale your business with our scalable solutions
We help global companies grow their business in the Japanese market by using the latest technology, such as AI (machine learning and deep learning). We do this by working closely with our engineering team in Silicon Valley.
Unparalleled media power
Unmatched reach
LINE has 97 million users (*1), accounting for about 80% of the total population of Japan. (*2)
Highly active user base
Over 60% of users in all age groups, regardless of gender, say they use LINE every day. This is especially true for women aged 20-24, 25-29, and 35-39, where over 90% of users say they use LINE every day.
Reach a wide audience
LINE is heavily used by a wide range of people on a daily basis, regardless of gender, age, or occupation. This makes it possible to reach users with a wide range of attributes.
Leverage rich data
LINE Ads lets you target your ads with high precision. You can target based on user attributes, such as their registered gender and age, as well as predicted interests based on their behavioral history.
TYPES OF ADS
LINE Ads (Guaranteed)
A platform that can reach over 80% of the Japanese population
LINE Ads can be displayed as static images or videos at the top of the LINE message list, providing an explosive daily reach that is one of the largest in Japan.
LINE Ads (Auction)
Reach an unparalleled number of users through various distribution channels
Reach 97 million domestic users who use the LINE app with your ads.(*1) Reach a wide range of age groups with large ad distribution potential.
Watch Our Videos
LINE Frequently Asked Questions
Q. Why is LINE essential in Japan?
A. Because of its massive reach. LINE’s user base has grown steadily every year, reaching 100 million monthly active users in Japan (as of December 2025) and covering over 80% of the population*. According to a report by Japan’s Ministry of Internal Affairs and Communications (MIC), LINE ranks No. 1 in usage among social media services/apps across every age group from teens through people in their 60s. This gives you access to audiences that are difficult to reach through other channels.
*LY Marketing Campus page (in Japanese)
Q. How do Japanese users interact with LINE?
A. LINE functions as a “super app” for daily life in Japan, built around messaging and voice/video calls. Beyond communication, it offers a wide range of services—such as LINE NEWS, LINE Manga, LINE Music, LINE Games, LINE VOOM (short-form video), and LINE Coupons—spanning entertainment and shopping. It also serves as essential everyday infrastructure in Japan: users receive official updates and notifications from businesses and local governments. From businesses, they can also receive coupons and special offers, stay updated through loyalty programs, and even access customer support—all within the app.
Q. Who are LINE users?
A. LINE’s audience skews slightly female (53.3% women vs. 46.7% men)*, but it is used broadly across age groups—from teens through people aged 65 and above—resulting in a well-balanced generational mix. The age breakdown is as follows: 15–19 (7.9%), 20–24 (7.5%), 25–29 (7.5%), 30–34 (8.4%), 35–39 (8.9%), 40–44 (10.5%), 45–49 (12.1%), 50–54 (10.1%), 55–59 (9.4%), 60–64 (8.7%), and 65+ (9.0%)*.
*LY Marketing Campus page (in Japanese)
Q. Which ad formats are supported for delivery on LINE?
A. As of April 2026, LINE Ads and Yahoo! JAPAN Display Ads have been integrated into a single platform, LY Ads Display Ads. Following this integration, ads created in LY Ads Display Ads (Auction) can be delivered across the LINE app and other LINE family apps.
The following ad formats are supported for delivery within the LINE app:
- Banner (Image) — aspect ratios: 1:1, 6:5, 16:9
- Banner (Video) — aspect ratios: 1:1, 16:9
- Responsive (Image) — aspect ratios: 1:1, 1.91:1, 3:2
- Responsive (Video) — aspect ratios: 1:1, 16:9, 9:16, 3:2
- Carousel
- Dynamic Display Ads
Q. Where do LINE ads appear?
A. Ads delivered through LY Ads Display Ads (Auction) can appear across a wide range of placements within the LINE app, including high-reach areas such as the Talk List (chat list) and LINE NEWS. In addition, through the LINE Ads Network, ads can reach users across more than 13,000* third-party apps.
*As of October, 2024
Q. What targeting options are available for ads delivered on LINE?
A. Ads delivered on LINE via LY Ads Display Ads (Auction) support a wide range of targeting options, including device, gender, age, audience lists, day and time, region, placement, and content keywords. For more details, please contact us.
Source
*1 - LY Corporation Media Guide, Nov 2024
*2 - LINE Business Guide