3rd generation · DSP Media

A-JAX

エージャックス / 에이젝스

A-JAX arrived from DSP Media, the company behind KARA and SS501, and the debut was pitched at Korea and Japan at the same time.

  • 2012DebutJun 1, 2012
  • 8Members
  • 3thGeneration
  • A-LIGHTFandom
One 4 U / Official MV

Last updated:

01

In 30 seconds: A-JAX

One 4 U opens with something close to grandeur, while Hot Game, 2MYX and Snake pull toward summer pop and sharp hooks.

Useful if you follow agency lineages and want to see what DSP Media built after SS501.

02

Key facts

Group name
A-JAX
Reading / Hangul
エージャックス / 에이젝스
Company
DSP Media
Debut date
June 1, 2012
Days active
5,221 days (14 years, 3 months)
Debut song
One 4 U
Generation
3rd generation
Fandom name
A-LIGHT(エーライト)
03

Member guide

Profile comparison

MembersBirth dateBlood typeMBTINationality
ドウ1988-12-0337181cmBNot disclosedSouth Korea
ジェヒョン1990-04-0236180cmBNot disclosedSouth Korea
ジフ1991-04-2935180cmABNot disclosedSouth Korea
ユニョン1993-02-1533182cmBNot disclosedSouth Korea
ソンミン1993-05-3133188cmANot disclosedSouth Korea
スンジン1994-10-0531176cmBNot disclosedSouth Korea
スンヨプ1994-10-2331185cmANot disclosedSouth Korea
ジュンヒ1995-11-2730180cmONot disclosedSouth Korea

Ages are as of 2026-09-17.

Selected releases

04

Start here

Follow a few songs from the starting point to the group's current sound.

View all official videos →
05

From debut to now

  • 2012
    Introduced first as DSP Boyz, the group took its Korean debut with One 4 U and rolled out a Japanese version of One 4 U in the same year.
  • 2013
    A heavy early image gave way to poppier concepts with more character, widening the range on show.
  • 2015
    The Japanese single Romeo opened the later route into Japan and became a comparison point either side of the lineup change.
  • 2016
    Departures by Jaehyung, Sungmin and Jihu plus the arrival of Joonghee moved the group into its later formation.
  • 2019
    About seven years after the debut the contracts ended, and the members moved into acting, modelling and music production on their own.
06

Key achievements

Key milestones

2012Debut in Korea and Japan at the same timeOne 4 U ran in both Korea and Japan, and the group was introduced as the next boy act carrying DSP overseas.
2012A-LIGHT set as the official fandom nameThe fandom name was settled early on, giving the group a community route as part of the DSP family.
2019Contract ends after seven years of activityEven after the disbandment reports, A-JAX left a catalogue that can be followed through solo work and official music videos.
10

Official links

Official site

Official social accounts and platforms

Shopping guide

Verified English shopping links are not yet available.

12

KPOP DISCOVER's A-JAX note

What holds A-JAX together is the range of an early boy group in the DSP line. They debuted formally on June 1, 2012 with One 4 U, arriving inside the lineage of DSP Media, the company behind KARA, SS501 and Rainbow, so the label context makes their place easy to read.

A good first pass runs One 4 U, then Hot Game, then 2MYX. Those cover the heavy debut track, a bright summer song and a hook-driven pop cut, which is the early range of A-JAX in miniature.

From there, Insane, Snake and Romeo, together with what followed the later addition to the lineup, show how the roster shifted and how the scale of activity changed. Sorting the difference between each formation matters more than the best known songs alone. Running One 4 U into Hot Game into 2MYX covers the debut, the summer track and the hook.

Editors' take One 4 U / Hot Game / 2MYX — three tracks carrying the early range of a DSP boy group, from a five-piece.

13

Japan activity score

KPOP DISCOVER original metric
No. 86/ 210 groups

No. 86 of 210 groups with recorded activity in Japan (top 41%)

  • 3Japanese releases
  • 12Japan-related tracks
  • 0Members from Japan
  • 0Official Japanese accounts

The denominator is the 210 groups, out of 525 covered by KPOP DISCOVER, whose raw score reaches at least one point. The score adds 10 points per Japanese-market release, 3 per Japan-related track, 12 per member from Japan, and 8 per official Japanese account. Japanese-market releases carry the most weight because they are the most direct evidence of activity; related tracks add track-level detail; members from Japan stand for Japanese-language communication and continuity; official accounts stand for a permanent point of contact. The weights are an editorial judgement, not a statistical optimisation, and the ranking tracks release volume in Japan closely. Source: releases, tracks, members, and official links recorded by KPOP DISCOVER (updated 2026-09-17).

How this score is calculated →View in Japanese

Frequently asked questions

What defines A-JAX?
One 4 U opens with something close to grandeur, while Hot Game, 2MYX and Snake pull toward summer pop and sharp hooks.
Why should a new listener start with A-JAX?
Useful if you follow agency lineages and want to see what DSP Media built after SS501.
Which songs should a new listener try first?
Start with One 4 U, Hot Game, 2MYX, then continue to the official video index.