hrtz.wav Members Profile: Bio, Age, Career & Net Worth 2026
The K-pop landscape in 2026 has been electrified by a fresh and unconventional sound—hrtz.wav (하츠웨이브). Unlike the typical idol groups dominating the charts, hrtz.wav is a five-member multinational band that brings raw instrumental talent, emotional storytelling, and a unique visual concept to the forefront. But who are the members of this exciting new group? What is their story, and what makes them so different from everything else in K-pop?
hrtz.wav is not your average boy band. Formed through Mnet’s survival show STEAL HEART CLUB, the group consists of three Korean members and two Japanese members, making them a truly global act from day one. What truly sets them apart, however, is drummer Hagiwa’s masked identity—he does not reveal his face, age, or natural voice, maintaining a fascinating concept that he was “born in Hagiwa World in Japan”.
In this comprehensive hrtz.wav members profile, we will explore everything you need to know about this rising K-pop band—from their individual backgrounds, ages, and roles, to their career journeys, net worth, and fun facts that will make you fall in love with each member.
Quick Facts Table
Table of Contents
Who Is hrtz.wav?
hrtz.wav is a five-member global band under Kakao Entertainment. The group was formed through Mnet’s band survival show STEAL HEART CLUB, where contestants competed in their respective instrument positions. The five winners—one for each position—came together to form the final lineup.
The band’s name is a creative combination of “Hertz” (hrtz), referring to the frequency of the heart and soul as well as the frequency of sound, and “.wav”, symbolizing raw, high-quality sound and waves. This name reflects the group’s ambition to “create a new wave in the world” through their music.
hrtz.wav is unique in the K-pop scene for several reasons. First, they are a live instrument band rather than a typical dance-focused idol group. Second, they are multinational, with members from both South Korea and Japan. Third, drummer Hagiwa performs with a fully masked identity, adding an element of mystery and theatricality to the group.
Their fandom name is hrtz.on, announced on May 27, 2026—just 50 days after their debut. The name symbolizes that hrtz.wav and their fans’ hearts are always connected (ON) and that they are beings who light up each other’s hearts.
Early Life and Education
The members of hrtz.wav come from diverse backgrounds across South Korea and Japan. Each member’s journey to becoming a professional musician is unique, shaped by years of training, education, and an unwavering passion for music.
Youn Youngjun (윤영준)
Born on March 21, 2000, in Suwon, Gyeonggi-do, South Korea, Youn Youngjun moved to Ansan at the age of three. He was a band member during his high school years, which laid the foundation for his musical career. Before joining hrtz.wav, he was a member of the band NND from 2024 to 2025.
Riaan (리안)
Born Yoon Eui-jin (윤의진) on January 16, 2003, Riaan is the group’s lead vocalist. His English name is Brian Yoon. Details about his early education remain limited, but his powerful vocal abilities have been evident since his appearance on STEAL HEART CLUB.
Dane (데인)
Born Lee Yong-jun (이용준) on July 20, 2004, Dane showed an early interest in music. Around the age of 13, he wanted to sing and asked his piano teacher for guidance. He is not only the group’s bassist but also an all-round musician who writes, composes, and arranges songs while also handling vocals.
Keiten (케이텐)
Born Ishibashi Keiten (石橋啓天) on December 4, 2006, Keiten is the group’s guitarist and the youngest Korean-age member. He is an alumnus of the prestigious Berklee College of Music, where he studied performance. His polished guitar techniques and versatile musical style across diverse genres set him apart.
Hagiwa (하기와)
Hagiwa’s background is the most mysterious of all members. Born on November 23—though his birth year is unknown—he claims to have been “born in Hagiwa World in Japan” three years ago. His official profile lists his birth date as November 23, 2022 (self-proclaimed). Before joining hrtz.wav, he was an influencer.
Career Journey
Pre-Debut Career
The road to hrtz.wav’s debut began with Mnet’s survival show STEAL HEART CLUB, which premiered in October 2025. The show brought together talented musicians from around the world to compete for a spot in a global band. CNBLUE’s Jung Yong Hwa served as a judge on the show.
Youn Youngjun had prior experience as a member of the band NND (2024-2025), where he wrote and composed all the tracks on their debut album Wonder, I. This was his first songwriting experience.
Dane released his first single, “Selfie,” in 2024 before joining the survival show.
Keiten brought his Berklee College of Music education and polished guitar skills to the competition.
Hagiwa was already known as an influencer before appearing on the show, and his masked persona quickly became a talking point.
The show crowned winners in key band roles—Keiten (guitar), Hagiwa (drums), Dane (bass), Riaan (vocals), and Youn Youngjun (keyboard). They were formed as a group on December 23, 2025.
Debut and Rise to Fame
hrtz.wav officially debuted on April 8, 2026, with their first mini-album, The First Wave. The debut showcase was held at the Cultural Reserve Base in Mapo-gu, Seoul.
The EP portrays how the five members, each with their own distinct frequencies, come together in a previously silent world to create their “first wave”. It explores diverse emotions of youth—ranging from excitement and confusion to love and heartbreak.
The title track, “NINETEEN,” is a youth pop rock track built on warm synth sounds. The age 19 represents not only the legal age of adulthood in Korea but also the symbolic threshold between youth and coming of age. All hrtz.wav members participated in writing its lyrics, bringing their creativity and sentiment to the track.
The EP also features:
- “Dream” — a lively and dynamic song about growing feelings of affection
- “Highlight” — a modern rock track expressing lingering love after a breakup
- “I AM SO FINE” — portraying longing and emptiness after a breakup
- “Outta my mind” — a dreamy track co-written by Riaan and Dane
- “Close To Me” — symbolizing the first page of hrtz.wav’s journey with fans
At their debut showcase, Dane shared that the band had worked hard for four months after the closure of STEAL HEART CLUB to prepare for this moment. Youn Youngjun called the debut “both exciting and emotional,” calling it “a chance to repay everyone who waited for us”.
Recent Activities
Since their debut, hrtz.wav has been actively promoting and building their presence both in Korea and internationally.
May 2026: The group released “You Keep Me Here” as part of the OST for Kakao Entertainment’s hit production Perfect Crown. The OST was released on May 2, 2026.
May 2026: hrtz.wav performed at KCON JAPAN 2026, marking their first major international festival appearance. They also performed at the 2026 Awesome Music Festival.
May 27, 2026: The group officially announced their fandom name, hrtz.on.
June 2026: The group continued to build momentum, with their unique multinational lineup and Hagiwa’s masked concept generating significant buzz in both Korean and Japanese media.
hrtz.wav has expressed ambitions to perform at global festivals like Glastonbury and Coachella, sharing their music worldwide. Their goal is to “become leaders in the global band scene, not just in Korea”.
Family Background
Information about the members’ families is limited, as is common with many K-pop artists who prefer to keep their personal lives private.
Youn Youngjun: Born in Suwon, Gyeonggi-do, South Korea, he moved to Ansan at age three. Further family details have not been publicly disclosed.
Riaan: Born Yoon Eui-jin in South Korea. His family background remains private.
Dane: Born Lee Yong-jun in South Korea. No public information is available about his family.
Keiten: Born Ishibashi Keiten in Japan. His family background has not been disclosed.
Hagiwa: Born in Japan (according to official announcements). Given his masked identity and conceptual persona, almost no personal information—including family details—is publicly available.
Height, Weight, and Physical Appearance
hrtz.wav is a visually striking group with diverse heights and builds. Here are the known physical statistics for each member:
Note: Some physical statistics are not publicly available as of 2026. Hagiwa’s height is the shortest in the group at 163 cm (5’4″), while Dane is the tallest at 188 cm (6’2″). The group’s average height is approximately 176.3 cm (5’9″).
Dane is notably the tallest member at 188 cm (6’2″) and is often described as having a very calm and composed demeanor despite being only 21 years old.
Hagiwa not only wears a mask but also speaks with an altered voice enabled by a special microphone, maintaining his character that he was “born in Hagiwa World”. He does not reveal his face, age, or natural voice.
Relationship Status
As of 2026, all hrtz.wav members are believed to be single and focused on their careers. This is standard for newly debuted artists, as agencies typically enforce dating bans during the early years of a career to allow artists to build their fanbase and establish themselves in the industry.
While some members may have been in relationships before debut, there is no publicly confirmed information about any member currently dating. Fans should respect their privacy and support them in their professional endeavors.
Net Worth and Income Sources
As a newly debuted group (April 2026), detailed financial information about hrtz.wav members’ individual net worth is not publicly available. However, we can analyze their potential income sources:
Primary Income Sources
- Album Sales — Their debut EP The First Wave has generated significant sales, with the group achieving strong debut numbers.
- Music Streaming — Revenue from platforms like Spotify, Apple Music, Melon, and various Japanese streaming services.
- OST Appearances — The group contributed to the OST for Perfect Crown, a Kakao Entertainment production.
- Live Performances — Concerts, fan showcases, and festival appearances including KCON JAPAN 2026 and the Awesome Music Festival.
- Brand Endorsements — As a Kakao Entertainment artist with a unique concept, endorsement deals are likely in development.
Estimated Net Worth
As of 2026, no verified public information is available regarding the members’ individual net worth.This estimate will grow significantly as they release more music, tour, and secure endorsement deals.
Social Media Profiles
hrtz.wav maintains an active presence across multiple social media platforms:
| Platform | Handle |
|---|---|
| YouTube | @hrtzwav |
| @hrtz.wav_official | |
| X (Twitter) | @hrtz_wav |
Individual Member Social Media
- Youn Youngjun: Instagram @youn9wns
- Riaan: Instagram @riaanyoon
- Dane: Instagram @1danee_
- Keiten: Instagram @ke1ten_
- Hagiwa: No known personal social media (maintains masked identity)
Awards and Achievements
Though hrtz.wav debuted only in April 2026, they have already achieved significant milestones:
As a rookie band, hrtz.wav is eligible for various “Rookie of the Year” awards at major Korean award ceremonies later in 2026. Given their strong debut and unique concept, they are strong contenders for these honors.
10 Interesting Facts About hrtz.wav
- Masked Drummer — Hagiwa performs with a full mask and does not reveal his face, age, or natural voice. He claims to have been “born in Hagiwa World in Japan” three years ago.
- Multinational Lineup — hrtz.wav consists of three Korean members (Youn Youngjun, Riaan, Dane) and two Japanese members (Keiten, Hagiwa).
- Berklee Alumnus — Guitarist Keiten is an alumnus of the prestigious Berklee College of Music.
- Member-Written Debut — All five members participated in writing the lyrics for their debut title track “NINETEEN”.
- Youn Youngjun’s Experience — Before hrtz.wav, Youn Youngjun was a member of the band NND and wrote all the tracks on their debut album.
- Dane the All-Rounder — Dane not only plays bass but also writes, composes, and arranges songs while handling vocals.
- The Tallest and Shortest — Dane is the tallest member at 188 cm (6’2″), while Hagiwa is the shortest at 163 cm (5’4″).
- Fandom Name Meaning — Their fandom name hrtz.on symbolizes that hrtz.wav and fans’ hearts are always connected.
- Global Festival Goals — The group has expressed ambitions to perform at global festivals like Glastonbury and Coachella.
- Name Origin — Member Keiten contributed to naming the band. The name combines “Hertz” (heart & sound frequency) and “.wav” (raw, high-quality sound).
FAQ Section
1. When did hrtz.wav debut?
hrtz.wav officially debuted on April 8, 2026, with their first mini-album The First Wave.
2. Who are the members of hrtz.wav?
The five members are Youn Youngjun (keyboard), Riaan (vocals), Dane (bass), Keiten (guitar), and Hagiwa (drums).
3. What does hrtz.wav mean?
The name combines “Hertz” (hrtz)—referring to the heart, soul, and frequency of sound—with “.wav” —symbolizing raw, high-quality sound and waves.
4. What is hrtz.wav’s fandom name?
Their fandom name is hrtz.on, announced on May 27, 2026. It symbolizes that hrtz.wav and their fans’ hearts are always connected.
5. Who is the oldest member of hrtz.wav?
Youn Youngjun (born March 21, 2000) is the oldest member at 26 years old (as of 2026).
6. Who is the youngest member of hrtz.wav?
Keiten (born December 4, 2006) is the youngest member at 19 years old (as of 2026).
7. What company manages hrtz.wav?
hrtz.wav is under Kakao Entertainment.
8. Why does Hagiwa wear a mask?
ptual persona that he was “born in Hagiwa World in Japan” three years ago. He does not reveal his face, age, or natural voice, adding a unique theatrical element to the group.
9. What was hrtz.wav’s debut song?
Their debut title track is “NINETEEN,” a youth pop rock track about the symbolic threshold of being 19 years old.
10. Did hrtz.wav appear on any survival shows?
Yes, all members were winners of Mnet’s band survival show STEAL HEART CLUB, where they competed in their respective instrument positions.
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