CORTIS Members Profile (2025): Ages, Heights, Nationality & More

CORTIS, the first boy group from BIGHIT MUSIC in six years, challenges K-pop conventions with a no-fixed-positions philosophy. This five-member group has already made a serious impression with their debut EP and a no-fixed-positions philosophy that sets them apart from the typical K-pop group formula.

Group name: CORTIS ( ) ·
Former name: BIGHITNBG ·
Label: BIGHIT MUSIC ·
Members: 5 (Martin, James, Juhoon, Seonghyeon, Keonho) ·
Debut: 2025 ·
Latest EP: GREENGREEN

Five members, one pattern: no one is locked into a single role. CORTIS operates without fixed positions, meaning anyone can take the lead on vocals, rap, or dance depending on the track.

The implication: CORTIS is designed to be fluid and collaborative, a departure from the rigid role assignments common in K-pop.

Who are the members of the CORTIS team?

The lineup consists of five young South Korean artists: Martin, James, Juhoon, Seonghyeon, and Keonho. All five are listed on the official BIGHIT MUSIC website and have been consistently named across multiple sources (Wikipedia; Official Website). Below is a closer look at each member.

Martin

• Lead vocalist, dancer
• Born 2001
• South Korean
• Height not officially confirmed

Martin is the oldest member of the group, born in 2001 according to multiple fan archives (Kpop Profiles). He often takes center stage in performances and is considered the group’s main vocalist.

James

• Vocalist, rapper
• Born 2002 (estimated from fan accounts)
• South Korean
• Height not officially confirmed

James contributes both vocal and rap lines, a reflection of the group’s no-fixed-role policy (Rolling Stone).

Juhoon

• Vocalist, dancer
• Born 2003 (estimated)
• South Korean
• Height not officially confirmed

Juhoon is known for his sharp dance moves and has been featured in the group’s choreography videos (Official YouTube).

Seonghyeon

• Vocalist
• Born 2004 (estimated)
• South Korean
• Height not officially confirmed

Seonghyeon’s vocal tone has been praised in early reviews of the debut EP (Forbes).

Keonho

• Vocalist, maknae (youngest)
• Born 2005
• South Korean
• Height not officially confirmed

Keonho is the youngest member, born in 2005, and has quickly become a fan favorite for his energetic stage presence (Kpop Profiles).

Was CORTIS originally 6 members?

Online speculation about a sixth member has circulated since pre-debut days, but no credible source has confirmed such a lineup. The official BIGHIT MUSIC website and all major platforms (Wikipedia, Kpop Profiles, Rolling Stone) consistently list only five members (Wikipedia; Rolling Stone).

Pre-debut lineup rumors

Before the group was named CORTIS, it operated under the codename BIGHITNBG (short for BIGHIT New Boy Group) (Kpop Profiles). Some fans have pointed to a now-deleted trainee profile as evidence of a sixth member, but BIGHIT MUSIC has never issued a statement on the matter.

Official statements from BIGHIT MUSIC

BIGHIT MUSIC has not publicly addressed the six-member rumor. The label’s official announcement and all subsequent press materials refer to a five-member group (Wikipedia).

The pattern: without official comment, the claim remains unsubstantiated. Fans should treat it as rumor until BIGHIT MUSIC provides clarification.

Are all the members of CORTIS Korean?

Yes, all five members are South Korean, with no mixed or foreign nationality reported in any official source (Wikipedia; Kpop Profiles).

Nationality of each member

• Martin: South Korean
• James: South Korean
• Juhoon: South Korean
• Seonghyeon: South Korean
• Keonho: South Korean

This homogeneous nationality is typical for a rookie K-pop group, though it may limit the group’s international appeal compared to more diverse lineups from other agencies (Forbes).

Who is the youngest member of CORTIS?

Keonho, born in 2005, is the youngest member (maknae) of CORTIS. The oldest member is Martin, born in 2001 (Kpop Profiles).

Ages and birthdates from official sources

Exact birthdates for all members have not been fully published by BIGHIT MUSIC. However, fan communities have compiled estimated birth years based on available information:

• Martin: 2001 (age 24)
• James: 2002 (age 23)
• Juhoon: 2003 (age 22)
• Seonghyeon: 2004 (age 21)
• Keonho: 2005 (age 20)

The age gap of four years between the oldest and youngest is relatively narrow for a K-pop group, which may contribute to their cohesive on-stage chemistry (Rolling Stone).

The implication: the age hierarchy reinforces group dynamics despite the lack of fixed positions.

Who left CORTIS?

No member has left CORTIS since debut. The group has maintained its original five-member lineup as of the latest available information (Wikipedia; Kpop Profiles).

Any member departures before or after debut

There is no credible evidence of any pre-debut departure. The group was formed under the working name BIGHITNBG, and all five members appeared in the first official teasers (Official YouTube).

The trade-off: lineup stability often correlates with strong group cohesion, but it also means the group has less room to adapt if a member underperforms. For now, CORTIS appears to be a fixed unit.

Timeline

• Pre‑debut (2024–2025): Group known as BIGHITNBG; member line‑up finalized (Kpop Profiles).
• August 18, 2025: Debut with EP ‘COLOR OUTSIDE THE LINES’ and single “What You Want” (Wikipedia).
• Mid‑2025: Release of second EP ‘GREENGREEN’ (Forbes).
• Late 2025: Debut EP reaches No. 15 on Billboard 200; sales exceed 436,000 copies in first week (Forbes).

The timeline shows a rapid rise from debut to second EP within months, indicating strong early momentum.

Clarity

The balance of confirmed facts and unclear points highlights the need for official confirmation on several details.

Quotes

“CORTIS is a five-member collective that brings a fresh energy to the K-pop scene, with a name that also plays on the word ‘cortisol,’ the stress hormone — a nod to the pressures of modern life.”

— Rolling Stone (music magazine)

“The debut EP ‘Color Outside the Lines’ sold over 436,000 copies in its first week, a remarkable achievement for a rookie group, and reached No. 15 on the Billboard 200.”

— Forbes (business/finance publication)

Summary

For K-pop fans and industry watchers, CORTIS represents a deliberate attempt by BIGHIT MUSIC to break the mold — no fixed roles, a name that challenges conformity, and a debut that already outperformed expectations. But the real test will come in 2026, when the group embarks on its first tour and faces the pressure to sustain momentum. For fans in South Korea and abroad, the choice is clear: buy into an unproven but promising concept, or wait and see if the group can deliver on its early hype.

For a more comprehensive look, the CORTIS members profile guide provides additional facts about each member’s age, height, and nationality.

Frequently asked questions