KPOP 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
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
- 5,265 days (14 years, 4 months)
- Debut song
- One 4 U
- Generation
- 3rd generation
- Fandom name
- A-LIGHT(エーライト)
03
Member guide
ジフ지후 · JihuView in Japanese
ユニョン윤영 · YunyoungView in Japanese
Profile comparison
| Members | Birth date | Blood type | MBTI | Nationality | ||
|---|---|---|---|---|---|---|
| ドウ | 1988-12-03 | 37 | 181cm | B | Not disclosed | South Korea |
| ジェヒョン | 1990-04-02 | 36 | 180cm | B | Not disclosed | South Korea |
| ジフ | 1991-04-29 | 35 | 180cm | AB | Not disclosed | South Korea |
| ユニョン | 1993-02-15 | 33 | 182cm | B | Not disclosed | South Korea |
| ソンミン | 1993-05-31 | 33 | 188cm | A | Not disclosed | South Korea |
| スンジン | 1994-10-05 | 32 | 176cm | B | Not disclosed | South Korea |
| スンヨプ | 1994-10-23 | 32 | 185cm | A | Not disclosed | South Korea |
| ジュンヒ | 1995-11-27 | 30 | 180cm | O | Not disclosed | South Korea |
Ages are as of 2026-10-31.
Selected releases
04
Start here
Follow a few songs from the starting point to the group's current sound.
One 4 U MVOne 4 U is the official debut and shows how much scale the company put behind it.
Hot Game MVHot Game is bright and summery, and the gap against the debut is the point.
2MYX MV2MYX has the catchiest hook of the early singles.05
From debut to now
- 2012Introduced 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.
- 2013A heavy early image gave way to poppier concepts with more character, widening the range on show.
- 2015The Japanese single Romeo opened the later route into Japan and became a comparison point either side of the lineup change.
- 2016Departures by Jaehyung, Sungmin and Jihu plus the arrival of Joonghee moved the group into its later formation.
- 2019About seven years after the debut the contracts ended, and the members moved into acting, modelling and music production on their own.
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Achievements
Key milestones
10
Official links
Official site
Official social accounts and platforms
Shopping guide
Verified English shopping links are not yet available.
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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.
Trivia worth knowing
Name
A-JAX takes its name from the hero Ajax, which ties directly to the forceful debut concept.
DSP
Seen inside the DSP Media lineage that held SS501, KARA and Rainbow, the expectations around this debut make sense.
Japan activity
Adding the Japanese titles, such as the Japanese version of One 4 U and Romeo, widens the view of what the act did.
Line-up
The line-up moved from seven members to five, so it helps to note which era an MV belongs to.
Official videos
MVs are split across the A-JAX channel, 1theK, DSP Friends and the Japanese official account, so the same song turns up under different uploaders.
Catching up
Acting work by Jihu, Jaehyung and Seungyub, and production by Joonghee, all lead back to the group itself.
13
Japan activity score
KPOP DISCOVER original metric
No. 89/ 241 groups
No. 89 of 241 groups with recorded activity in Japan (top 37%)
- 3Japanese releases
- 12Japan-related tracks
- 0Members from Japan
- 0Official Japanese accounts
The denominator is the 241 groups, out of 564 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 2026-10-26).
How this score is calculated →View in JapaneseFrequently 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.