How to Put Out THE BOYZ Fan Ads [2026] Birthday/Sengil Guide

April 22, 2026

What is a THE BOYZ Support Ad?

THE BOYZ is a 10-member boy group that debuted in Korea on December 6, 2017. They are currently managed by ONE HUNDRED. The members are Sangyeon, Jacob, Younghoon, Hyunjae, Juyeon, Kevin, New, Q, Sunwoo, and Eric. Their official fan club name is "THE B (더비)," and they have many enthusiastic fans in Japan, with the "THE BLAZE WORLD TOUR in JAPAN" announced for 2026.

A support ad (also known as a "birthday ad" or "saengil ad") is a fan culture activity where fans celebrate an artist's birthday or anniversary by placing advertisements on digital signage or outdoor billboards. This culture, originating in Korea, has become widespread in Japan, and fans organize support ads for each THE BOYZ member's birthday.

Reviewing ONE HUNDRED's Guidelines

THE BOYZ transferred from IST Entertainment to ONE HUNDRED in December 2024. It is crucial to check the latest guidelines from their current agency, ONE HUNDRED, before placing a support ad.

Generally, for K-POP artist support ads, permission from the agency may be required due to portrait rights and copyrights. Since guidelines vary by agency, please check the following points in advance:

Are permission guidelines published on their official website or social media?
Are there specific rules and conditions for using portraits in ad designs?
Are there any restrictions on ad media or display areas?
Are there mandatory design elements, such as contact information?

Oshi-Ad provides support for checking agency guidelines during the application process. If you have any concerns, we recommend consulting with us first.

Popular Media and Costs Among Fans

Here are the popular support ad media chosen by THE BOYZ fans and their estimated costs:

Digital Signage (Indoor): Approximately 30,000 yen and up. Can be displayed in commercial facilities in Shibuya and Shinjuku, or within train stations. A key feature is a short lead time, with ads able to be displayed in about a week.
Outdoor Vision (Large Billboards): Approximately 100,000 yen and up. Displayed on large screens in bustling areas like Shibuya Scramble Crossing and Umeda. They have a significant impact and are highly shareable on social media.
Ad Truck: Approximately 100,000 yen and up. Trucks drive around concert venues, making them highly effective for reaching fans attending events.
Poster Ads: Approximately 50,000 yen and up. Displayed within train stations or in commercial districts. Suitable for publicizing in areas frequented by THE BOYZ fans.

Crowdfunding, which individuals can participate in, allows fans to raise funds for support ads starting from 500 yen per share. This method distributes the cost, making it easier for first-time support ad organizers.

Popular Display Areas in Tokyo and Osaka

Here are the areas in Tokyo and Osaka that THE BOYZ fans often choose for support ad displays:

Tokyo Area

Shibuya: Large billboards around the Scramble Crossing and signage within Shibuya Station are classic spots for K-POP support ads, including THE BOYZ. Many fans gather here, and the potential for social media spread is high.
Shinjuku: Digital signage around Shinjuku Station and large billboards on the East and West exits have high traffic and wide reach. Popular media like Yunika Vision are concentrated here.
Harajuku/Omotesando: An area with many K-POP fans. Signage near Takeshita Street is suitable for targeting fans.

Osaka Area

Umeda/Namba: These are Osaka's two major commercial districts, where you can expect to reach fans in the Kansai region. Many large billboards and digital signage are installed here.
Shinsaibashi: An area with many K-POP related shops, making it highly compatible with THE BOYZ's fanbase.

If a concert tour is scheduled, displaying ads around the venue is particularly effective. Support ads around the venues for THE BLAZE WORLD TOUR IN JAPAN in 2026 are also garnering attention.

How to Place a Support Ad

Here are 3 steps to placing a THE BOYZ support ad as an individual:

Step 1: Determine Your Goal and Budget

Decide whose birthday you want to celebrate, or if it's a group anniversary, and set a budget. For individuals, 30,000 yen and up is a general guideline. If you're collecting funds from multiple fans through crowdfunding, participation can start from 500 yen per share.

Step 2: Choose Media and Area

Select the media that matches your message and budget. If impact is a priority, outdoor billboards are good; if you want to save costs, digital signage is suitable. For display areas, choose popular spots where target fans gather, such as Shibuya, Shinjuku, or Umeda.

Step 3: Create the Design and Apply

Create your ad design. Regarding portrait rights, please use official photos or images, or confirm agency guidelines before production. Oshi-Ad offers a one-stop service from design creation to application. The estimated time from application to display is typically one week.

What is Oshi-Ad?

Oshi-Ad is a service that allows individuals to place digital signage and other advertisements for their favorite idols, starting from approximately 30,000 yen. Operated by Curio Inc., it has handled numerous support ads, including for K-POP artists.

Individual applications accepted: Individuals can apply directly without going through an agency. It's easy to place ads for THE BOYZ members' birthdays.
Available from approximately 30,000 yen: Digital signage can be displayed from around 30,000 yen. This is suitable for those who want to try it out by themselves first.
Crowdfunding feature: Includes a crowdfunding feature where fans can contribute funds from 500 yen per share. The commission fee is the industry's lowest at 10%.
Display in as little as 1 week: The lead time is short, and it may be possible to accommodate requests even shortly before a birthday.

Agency guideline check support

If THE BOYZ fans want to celebrate a member's birthday with a support ad, they should first check out https://app.oshi-ad.com.

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