How to Put Out B1A4 Fan Ads [2026]: A Birthday and Live Event Senil Guide
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What is a B1A4 Fan Ad?
B1A4 (pronounced Bee-One-A-Four) is a South Korean male group that debuted on April 22, 2011. They are managed by WM Entertainment and currently consist of four members: CNU (Shin Dong-woo), Sandeul (Lee Jung-hwan), Baro (Cha Sun-woo), and Gongchan (Jung Chan-woo). Their fan club name is BANAs. Their hit songs include "Beautiful Target," "Tried to Walk," "What's Happening," and "Baby Goodnight." They have released Japanese albums and have been supported in Japan for many years.
In July 2025, they will hold their first Japan fan concert in seven years, "B1A4 2025 FAN-CON 'Singularity: Our Time' IN TOKYO," at Zepp Haneda, re-igniting the passion of BANAs across Japan. They continue to actively release music, such as the EP "SET" in 2026.
A fan ad (also known as a "saengil ad" or "birthday ad") is an advertisement placed by fans on digital signage or outdoor screens in cities to celebrate an artist's birthday or anniversary. While originating in South Korea, this culture is growing in Japan year by year, and among BANAs, the desire to "put out an ad for my bias" grows during birthday seasons. Services have emerged that allow individuals to place ads from approximately 30,000 yen, with the shortest placement period being one week, making it easier than ever to participate.
Checking WM Entertainment's Guidelines
Before placing a fan ad, it's crucial to check the guidelines of the artist's agency. WM Entertainment does not prohibit all fan ads, but they do have rules regarding portrait rights and copyrights. Generally, the following points need attention:
- Avoid using unofficial edited images that are not officially distributed.
- Do not use expressions that could be mistaken for commercial purposes.
- Ensure the content primarily expresses the fans' goodwill and support.
- If announcing the fan ad on social media beforehand, coordinate the content with other fans.
If you are unsure about interpreting the guidelines, you can consult with the Oshi-Ad operations team. Support for checking agency guidelines is available during the application process, so even first-time BANAs can proceed with confidence.
Popular Media and Costs for BANAs
| Media Type | Features | Estimated Cost |
|---|---|---|
| Digital Signage | Train stations, commercial facilities. Short lead time, easy for individuals to apply. | From approx. 30,000 yen |
| Outdoor Vision | Large monitors in busy districts. Highly visible, easily spread. | From tens of thousands of yen |
| Ad Truck | Advertising trucks moving around concert venues. | From tens of thousands of yen |
| Wrapping Ad | Placed on trains/buses. Long-term, wide reach. | From hundreds of thousands of yen |
Digital signage is particularly popular among BANAs. It allows for targeted placement coinciding with concert dates, offering visual impact at a lower cost. Crowdfunding fan ads, where multiple people share the cost, can be joined from 500 yen per share.
Popular Placement Areas in Tokyo and Osaka
- Shibuya (Tokyo): Large visions and digital signage around the Shibuya Scramble Crossing have high virality and spread easily on social media.
- Shinjuku (Tokyo): A wide range of outdoor advertising options, including the Alta Vision. An area where fans of Korean content gather.
- Haneda/Shinagawa (Tokyo): Located on access routes to venues like Zepp Haneda, allowing placement to coincide with concert attendance on the day of the event.
- Shinsaibashi/Namba (Osaka): Bustling districts where many fans familiar with Korean culture gather.
How to Place a Fan Ad
Step 1: Determine Purpose and Budget
Clearly define the purpose of the ad, such as celebrating a birthday, concert, or debut anniversary. Popular timings include member birthdays (CNU on January 16, Sandeul on March 20, Baro on September 5, Gongchan on August 14) and the debut anniversary (April 22). For individual placement, costs start from approximately 30,000 yen; for group contributions, a crowdfunding format is convenient.
Step 2: Choose Media and Area
Select the media type from digital signage, outdoor vision, or ad truck. Prioritizing locations near concert venues will increase reach to fans.
Step 3: Prepare Creative and Apply
Prepare the design after checking the agency guidelines, and apply through a dedicated service like Oshi-Ad.
What is Oshi-Ad?
Oshi-Ad is a fan-activity-specialized platform that allows individuals to place ads, such as digital signage, for their biases starting from approximately 30,000 yen.
- Individuals can place ads from approximately 30,000 yen.
- Placement can be arranged in as little as one week.
- Crowdfunding function available (participation from 500 yen per share).
- Service fees are among the lowest in the industry, at 10%.
- Support for checking agency guidelines is available.
If you're a BANA looking to express your feelings for B1A4 members' birthdays or during concert seasons, be sure to check it out.