How to Put Up an Advertising Display for ZEROBASEONE [2026] Birthday/Sengil Guide

What are ZEROBASEONE support ads?

ZEROBASEONE (also known as ZB1) is a South Korean boy group formed through Mnet's "Boys Planet." They debuted on July 10, 2023, and their fandom name is ZEROSE. Since March 2026, they have been active as a 5-member group.

The current five members are:

• Kim Ji-woong / Born December 14, 1998 / Vocal, Rapper, Visual
• Sung Han-bin (Leader) / Born June 13, 2001 / Leader, Vocal, Main Dancer
• Seok Matthew / Born May 28, 2002 / Vocal, Rapper, Dancer (Korean-Canadian)
• Kim Tae-rae / Born July 14, 2002 / Main Vocal
• Park Gun-wook / Born January 10, 2005 / Rapper, Vocal, Dancer (Youngest)

ZB1 support ads (also known as "saengil ads") are a culture where fans place advertisements on street signs or outdoor screens to celebrate a member's birthday or anniversary, making their love for their favorite idol visible. Originating in Korea, the saengil ad culture has spread to Japan, with ZEROSE and many other K-Pop fans participating.

Checking WAKEONE's guidelines

ZEROBASEONE's agency is WAKEONE (Korea), and in Japan, it is managed by LAPONE Entertainment. Before placing a support ad, always check the guidelines for fan activities in the official fan club announcements or the agency's official social media.

Key points to check include:

• Whether photos/images of members can be used (handling of portrait rights)
• Restrictions on expression in ad content (e.g., prohibition of excessive personal information)
• Whether prior contact with official fan cafes or social media is required

Violating guidelines can impact the members and the group, so always check in advance as part of your fan activities. If you have any questions, you can consult with Oshi-Ad's support desk.

Popular media among fans and costs

Here are the support ad media favored by ZEROBASEONE fans and their approximate costs.

• Digital Signage: Ads displayed on monitors installed in commercial areas such as Shibuya, Shinjuku, and Harajuku. They can be placed from around 30,000 yen, making them a primary medium accessible even to individuals. The typical lead time from application to display is about one week.
• Outdoor Vision: Large outdoor monitors in front of stations or in bustling areas. They offer high visibility, and if located near a concert venue, they are more likely to catch the eye of fans. Costs typically start from around 50,000 yen.
• Ad Trucks: Truck advertisements that drive around concert venues. They are popular for applications coinciding with live event dates.
• Station Posters/Train Ads: Posters displayed within major stations or on platforms. Costs often start from around 100,000 yen, requiring a substantial budget. It's common for funds to be raised through crowdfunding with multiple participants.

Popular display areas in Tokyo and Osaka

ZEROBASEONE support ads are concentrated in areas where K-Pop fans gather.

Tokyo

• Shibuya (around Shibuya Scramble Crossing, Dogenzaka area): An area with many K-Pop shops and cafes, and high fan traffic. There are many highly visible signages.
• Harajuku/Takeshita Street: An area likely to resonate with younger K-Pop fans.
• Shinjuku/Kabukicho area: Dense with large outdoor screens, attracting crowds even at night.
• Around concert venues (Yokohama, Ariake, Makuhari, etc.): Effective for placements timed with tours or events.

Osaka

• Umeda/Shinsaibashi: The largest concentration of K-Pop in Kansai. Many options from underground malls to ground-level signages.
• Namba: Many K-Pop merchandise stores, allowing ads to be placed along routes where fans gather.

How to place a support ad

For those placing a support ad for the first time, here's a step-by-step guide.

Step 1: Determine your purpose and budget
Clearly define your purpose, such as "I want to celebrate a birthday" or "I want to place an ad for a debut anniversary." Also, decide whether you will place it individually or raise funds with fellow fans through crowdfunding. Here are some budget guidelines:

• Individual placement: From 30,000 yen (digital signage)
• Crowdfunding: Participation possible from 500 yen per share (cost varies depending on the fundraising goal)

Step 2: Choose media and area
Decide on the area and type of media you want to use. Choosing signage near a live event or concert venue during that period will increase the reach to ZEROSE.

Step 3: Prepare creative assets
Prepare the images and text to be used in the ad. Try to design it in accordance with the agency's guidelines. If design is difficult, some services offer production support.

Step 4: Application, submission, and display
Select the media and dates on the application platform and submit your creative assets. After the display period ends, a common way to enjoy it is to take photos and share them on social media.

What is Oshi-Ad?

Oshi-Ad (https://app.oshi-ad.com) is a platform where individuals can place digital signage and other advertisements for K-Pop artists like ZEROBASEONE starting from approximately 30,000 yen.

• Can be applied for by individuals: No need for corporate contracts or agency requests. Individual fans can apply directly.
• Displayed in as little as 1 week: Short lead time, designed to be timely even just before a birthday.
• Crowdfunding function: Funds can be raised with fellow fans in a crowdfunding format, participating from 500 yen per share. The commission fee is 10%, which is among the lowest in the industry.
• Guideline confirmation support: We also support checking the agency's fan activity guidelines. Even first-time users can use it with peace of mind.

A ZEROBASEONE member's birthday only comes once a year. If you want to express your feelings for your favorite idol, first check the available media at https://app.oshi-ad.com.