Taesan BOYNEXTDOOR has quickly become one of Gen Z K-pop’s most intriguing all-rounders. A member of KOZ Entertainment’s boy group under HYBE, he blends sleek visuals with sincere, diary-like storytelling. Since BOYNEXTDOOR’s debut in May 2023, the singer-rapper has drawn attention for his thoughtful lyrics, mellow tone, and bookish charm, traits that helped the group stand out with music that feels conversational and relatable.
Complete Profile of Taesan BOYNEXTDOOR
Before diving into his artistic journey, let’s take a closer look at Taesan’s personal details that define his identity as one of BOYNEXTDOOR’s core members.
- Stage Name: Taesan (태산)
- Birth Name: Han Dong-min (한동민)
- Birthday: August 10, 2004
- Age: 21 (as of 2025)
- Nationality: Korean
- Birthplace: Gwangju, South Korea
- Height: ~182 cm (approx. 6’0”)
- Blood Type: A
- MBTI: INTJ
- Representative Emojis: 🐈⬛, ⛰️
- Roles: Vocalist, rapper, songwriter, composer
- Agency: KOZ Entertainment (a HYBE label)
- Group: BOYNEXTDOOR (debuted May 30, 2023)
- Hobbies & Skills: Reading novels, playing piano, photography/film, DIY/customizing items
Taesan BOYNEXTDOOR’s Age and Background
Born on August 10, 2004, Taesan belongs to the 2004-line in K-pop, placing him squarely in the rising fifth-generation wave. He grew up in Gwangju before training to become an idol, and fans often associate him with a calm, introspective image. As of 2025, Taesan is 21 years old. Beyond stage activities, he’s known for a love of literature and analog music, LPs and paperbacks alike, which subtly informs the way he approaches lyricism and mood in BOYNEXTDOOR tracks.
Interesting Facts About Taesan BOYNEXTDOOR
Aside from his stage presence and creative input, Taesan’s personality shines through his unique habits and preferences. Here are some fun and fascinating details every fan should know about him:
- Self-producing idol: Taesan has earned multiple song credits within BOYNEXTDOOR’s discography, contributing to both lyrics and composition.
- Book lover on and off stage: He frequently cites reading as a favorite pastime and has even recommended contemporary Korean novels to fans.
- Piano player: Music is second nature, he plays piano and often references it as a go-to way to unwind and sketch song ideas.
- Representative emojis: Fans use the black cat and mountain to symbolize his dual vibe, soft-spoken yet steady.
- Trainee roots: Before debuting with KOZ Entertainment, he accumulated years of training, honing writing and performance while shaping his understated confidence.
- Taste maker: He enjoys classic bands and alt-rock alongside modern K-pop, a blend that subtly shows up in the group’s textures and melodies.
- Nicknames and image: Known by affectionate nicknames like “Taet,” he’s often described as shy at first, but candid and witty once comfortable, qualities that color his verses and fan interactions.
Career Journey and Early Beginnings
Taesan’s road to the stage began long before BOYNEXTDOOR officially arrived. He trained through his teens, sharpening his vocals, rap cadence, and writing chops while absorbing diverse influences, from indie and rock to sleek K-pop production. In 2023, KOZ Entertainment unveiled BOYNEXTDOOR as a six-member act whose concept emphasized everyday stories and natural charm rather than distant idol mystique.
The group debuted on May 30, 2023 with the single album “WHO!” and quickly established their signature: easy-listening tracks that feel like overheard conversations between friends. Follow-ups expanded that palette. In 2024, their EP “HOW?” showcased a brighter, guitar-flecked sound with witty, colloquial lyrics. The group then leaned into their twenties with the 2025 mini-album “19.99,” opening a new chapter that reflected growth, touring ambitions, and viral moments. Along the way, BOYNEXTDOOR earned international stages, from KCON to major festivals, while building a reputation for home-grown creativity under the mentorship of KOZ founder Zico.
Role and Contributions in BOYNEXTDOOR
Within the team, Taesan is frequently highlighted as a creative core member. Even without rigid “official positions,” he functions as a vocalist-rapper hybrid with a keen pen, known for lyrics that read like entries from a youth diary, colloquial, wry, and emotionally direct. He has taken part in writing and composing across several BOYNEXTDOOR tracks, often helping anchor the group’s “everyday language” approach to storytelling.
Stylistically, Taesan’s tone lands somewhere between warm and airy, making him a strong fit for the group’s mid-tempo pop and pop-rock cuts. Onstage, he balances smooth line delivery with relaxed presence; offstage, his reading habit, love of LPs, and interest in film and photography feed into the group’s creative brainstorming, whether that’s lyrics, visuals, or mood boards for concept photos.
Achievements and Notable Highlights
Here are some of Taesan’s and BOYNEXTDOOR’s biggest milestones that have shaped their growing legacy:
- The group wrapped up their debut trilogy with “HOW?” in 2024, earning praise for cohesive storytelling and self-written lyrics.
- In 2025, they returned with “19.99,” a mini-album that reflected the members’ transition into their twenties and gained strong media attention.
- BOYNEXTDOOR performed at major global festivals, including Lollapalooza in Chicago, where they showcased their confident live performance before an international audience.
- Media outlets such as Teen Vogue and People Magazine featured them as rising stars in K-pop’s fifth generation.
- The group was included in multiple “Emerging Artist” and “Next Big Thing” lists in 2025, cementing their status as new leaders of the genre.
- Taesan continued adding songwriting and composition credits to his name, strengthening his role as one of BOYNEXTDOOR’s creative pillars.
- His introspective style and hands-on approach contributed significantly to shaping the group’s lyrical and emotional identity.
As BOYNEXTDOOR’s discography expands, Taesan’s name keeps appearing in the credits, signaling a member who’s as invested in what the group says as in how it sounds. For fans, that’s the appeal: Taesan BOYNEXTDOOR brings a quietly personal voice that helps make the songs feel lived-in, specific, and true to the group’s name, right next door.
With his steady creative presence, the road ahead looks promising. As touring scales up and new projects arrive, expect Taesan to keep refining the group’s lyrical DNA and adding more writing and composing credits to his résumé. If BOYNEXTDOOR’s first years are any indication, this “mountain” is still climbing.
In short, Taesan BOYNEXTDOOR is the archetype of a modern idol-creator, thoughtful, musically hands-on, and deeply tuned into the everyday language of youth, exactly the qualities that make BOYNEXTDOOR’s songs feel like stories you’ve lived yourself.
