Kep1er: Current Members, Former Members, History, Music and 2026 Guide

Group profile and current lineup

Current members	Yujin, Xiaoting, Chaehyun, Dayeon, Hikaru and Huening Bahiyyih
Former members	Youngeun, Mashiro and Yeseo
Companies	WAKEONE and KLAP Entertainment
Debut	January 3, 2022
Current status	Active six-member group; exact seven- and nine-member releases retain their historical participants
Fandom	Kep1ian

Kep1er is a six-member multinational girl group co-managed by WAKEONE and KLAP Entertainment: Yujin, Xiaoting, Chaehyun, Dayeon, Hikaru and Huening Bahiyyih. Former members are Youngeun, Mashiro and Yeseo. This hub separates current status from the exact seven-member “Yum” video and preserves the original nine-member history.

The current official answer is six

Kep1er’s Japan profile and June 2026 official merchandise list Yujin, Xiaoting, Chaehyun, Dayeon, Hikaru and Huening Bahiyyih. WAKEONE and KLAP’s March 6 notice said the group would continue with those six after Youngeun concluded team activities. That is the controlling roster as of August 28, 2026.

Yum is not a six-member video

“Yum” was released in 2025 during the seven-member extension chapter. Youngeun participates with the six people who remain current. The React and playlist therefore link seven profiles. Mashiro and Yeseo do not appear because their Kep1er activities ended in July 2024.

The group did not travel one straight line

The nine-member project period, seven-member contract extension and six-member current chapter each have different stakes. The hub keeps all three visible so survival is not mistaken for stasis. Continuing after a fixed term was an achievement; making each new lineup musically intentional remains the work.

The roster sentence is dated

Kep1er is one of Kep1er’s six current members as of August 2026: Yujin, Xiaoting, Chaehyun, Dayeon, Hikaru and Huening Bahiyyih. The official Japan profile and June 2026 merchandise name those six. Youngeun’s departure was announced March 6, 2026; Mashiro and Yeseo completed their Kep1er activities in July 2024.

Girls Planet 999 created the first nine

Mnet’s Girls Planet 999 placed Korean, Chinese and Japanese contestants inside a voting system built around planetary language. The finale formed Kep1er with nine members. Survival-show rank explains the entry point, but it should not freeze a performer into one episode or convert a televised edit into a permanent personality diagnosis. The released career is the larger file.

The name carries two directions

Kep1er combines “Kep,” representing members catching their dreams, with “1,” representing their movement toward the top as one. The astronomical pronunciation extends the show’s planet motif. The useful question is whether the music makes plurality and unity audible rather than treating the numeral as a decorative substitution in every title.

First Impact arrived with a clear engine

Kep1er debuted January 3, 2022 with First Impact and “WA DA DA.” The song’s clipped hook, racing percussion and formation changes introduced a group built for immediate motion. Its success gave the project scale quickly, but the same speed created a long-term challenge: later releases needed a distinct emotional center, not only another sequence of energetic parts.

A project group learned how to continue

Kep1er began with a limited contract, so every comeback carried an implied countdown. In 2024, seven members extended while Mashiro and Yeseo ended their Kep1er activities. That continuation was historically unusual for an Mnet project group. It also changed the critical question from how well a temporary team uses its window to what kind of durable identity the continuing members choose.

Nine, seven and six are all archive facts

The original lineup was nine. After July 2024, the group promoted with Yujin, Xiaoting, Chaehyun, Dayeon, Hikaru, Huening Bahiyyih and Youngeun. After Youngeun’s March 2026 departure, the official lineup became six. A responsible profile does not call every older video “OT6,” nor does it leave nine names under a current-members heading.

WA DA DA made motion the brand

The debut hook works because rhythm and gesture become one object. Its repeated syllables can travel through short clips while the full arrangement keeps changing formation. That accessibility helped international discovery, but it also encouraged shallow summaries that treated the group as one viral dance. The catalog after debut matters because it tests whether members can retain identity when the hook is less instantly extractable.

Queendom 2 tested scale under pressure

Kep1er joined Queendom 2 only months after debut, performing beside established acts while still learning their own group language. Competition stages can reveal arrangement and live adaptation, but ranks are not a complete quality measure. For Kep1er, the better evidence is how an existing part changes under a new stage concept and whether the camera captures a full performance decision.

Doublast changed the temperature

“Up!” and Doublast moved toward bright summer pop, showing that speed did not require the same metallic edge as debut. The lighter setting made vocal color and facial timing more visible. Cute performance should not be dismissed as easy: clarity, commitment and rhythmic precision are exposed when the concept cannot hide behind darkness, aggression or visual noise.

Troubleshooter leaned into impact

“We Fresh” intensified guitars, hero imagery and shouted momentum. The concept fit the group name directly, but thematic fit is not the same as musical inevitability. The strongest moments let members cut distinct rhythmic shapes through the chorus. The weaker risk is accumulation—adding one more effect when a cleaner melodic decision could have carried the same confidence.

Lovestruck found a sharper emotional hook

“Giddy” made attraction physically awkward and playful, giving the group a concept where choreography could act out uncertainty instead of only triumph. Lovestruck! matters because it placed nervous energy beside polish. A performer can be exact without looking emotionally settled, and that tension creates more character than a generic instruction to smile through every bright section.

Magic Hour used romance as timing

“Galileo” returned to planetary language through love and observation. Its appeal lies in clean timing, memorable gesture and a chorus willing to breathe. The era demonstrates why Kep1er analysis should not equate complexity with quality. Selection can be more mature than density, particularly for a group whose early identity was often described through how much happened at once.

Kep1going On closed the original nine

The June 2024 Korean album Kep1going On and “Shooting Star” became the final album chapter for the original nine-member lineup. The song’s emotional weight comes partly from that context, but it still has to work as music. A farewell interpretation should follow melody, lyric and staging rather than projecting tears onto every close-up.

The 2024 extension created seven

Mashiro and Yeseo concluded their Kep1er activities after the July 2024 Japan concerts, while seven members continued. Their exit was part of the contract-extension outcome, not a retroactive absence from the preceding two and a half years. Member pages must preserve their original-lineup participation and avoid assigning them to seven-member releases that came later.

Tipi-Tap was the first seven-member album

Released November 1, 2024, Tipi-Tap established the extended seven-member group in Korean promotions. The smaller lineup changed distribution and formations, but continuity depended on more than reducing counts. It gave the members an opportunity to make the extension sound chosen rather than like an administrative afterlife for a project whose expiration date had passed.

Yum belongs to exactly seven

Kep1er appears in the official 2025 “Yum” video with Yujin, Xiaoting, Chaehyun, Dayeon, Hikaru, Huening Bahiyyih and Youngeun. The local React attaches to those seven canonical pages. It does not attach Mashiro or Yeseo, who had already left, and it does not rewrite Youngeun out because the group is now six.

Yum treats alienation as appetite

“Yum” turns a seven-member alien landing into a short, bright dance weapon. The food language is playful, but the visual joke is also about outsiders learning a new environment by consuming its signals. The React follows beat, formation, editing and the abrupt 2:29 runtime instead of treating science-fiction props as a complete concept analysis.

A short runtime increases selection pressure

At under two and a half minutes, “Yum” has little space for a bridge or long individual development. Brevity can sharpen replay value, but it can also make distribution feel like a series of glimpses. The critical question is whether every section changes the song’s direction or whether the track ends just as its arrangement has established a deeper possibility.

Japanese releases are not side quests

Kep1er’s Japanese catalog has its own singles, tours, language choices and audience history. “Yum” led the 2025 Japan EP Against the World. Treating it as bonus content would erase a major route through which the multinational lineup communicates. The tracker labels language, market and release object accurately without using “Japanese” as a synonym for less important.

Bubble Gum followed with six active voices

The official Japan site identifies the August 2025 Bubble Gum release with six participating members while Youngeun was on hiatus. That difference illustrates why group membership and exact participation require separate cells. A temporary absence should not be converted into a departure before an announcement, but the specific video still needs the lineup actually present.

Youngeun’s exit was announced, not inferred

WAKEONE and KLAP announced on March 6, 2026 that Youngeun would conclude Kep1er activities and the group would continue with six members. Her preceding health hiatus should be described only through official language. The archive does not diagnose her or claim that one private cause explains a negotiated career decision.

Crack Code is the current six-member album

The March 31, 2026 mini album CRACK CODE is current six-member evidence. Its place after the departure matters: the continuing group is no longer simply promoting around a temporary absence. New distribution, formation and identity choices belong to the six people named on the official profile, while earlier seven-member work remains filed to seven.

The camera should show a complete choice

Fast editing can distribute screen time while concealing performance. A meaningful close-up catches a gaze, breath, lyric response or movement through completion. For Kep1er, this page asks what the cut reveals about musical function. Counting seconds can expose imbalance, but it cannot explain why a three-second moment changes the scene or why a longer shot remains dramatically empty.

Positions should not be invented

Yujin’s leadership was formally established, and Mashiro served as co-leader in the original lineup. Beyond accountable role language, the archive avoids turning fan shorthand into an official position chart. Members sing, rap and dance in changing proportions. Description is strongest when tied to a released arrangement rather than copied from a profile that cites no agency source.

Nationality is context, not personality

Kep1er was built as a Korean-Chinese-Japanese group and has promoted strongly in Japan. Language skill, market route and training background matter, but nationality cannot explain a person’s temperament or talent. The page uses names and languages to help discovery while refusing stereotypes that make one member “elegant,” “quiet” or “precise” simply because of origin.

Survival-show rank has an expiration date

Final voting determined who debuted, not a permanent artistic hierarchy. Line distribution, audience popularity and growth after debut can diverge from a 2021 rank. Kep1er should be evaluated through recorded and live work, not repeatedly forced to defend or celebrate the placement that opened the door. A career becomes more interesting when the first metric stops being its conclusion.

Kep1ian needs primary routes

The fandom name Kep1ian joins the group name with a suffix suggesting people who belong to its orbit. International fans often rely on translation accounts because Korean and Japanese schedules split across platforms. The safest workflow preserves the official link and date, then uses careful translation. A cropped screenshot without a source should not control roster, contract or health reporting.

The image card identifies one person

This profile uses a unique real official image stored locally in WordPress. Featured image, first hero, static landing card and social preview resolve to the same attachment. No sibling page reuses it. That parity makes long directories usable: a reader can recognize Kep1er before opening the page, and a later roster update does not scramble visual identity.

Participation belongs to the exact object

Because Kep1er participates in “Yum,” the playlist and React rows connect this page to video ID 3nMOUzBZ0ZI. A future six-member track will be checked separately. The system never assumes that current membership proves presence in a 2025 video, or that 2025 presence proves membership after March 2026.

What Kep1er changes

Kep1er changes when the members turn survival-show plurality into a shared performance language without erasing distinct national, vocal and movement identities. That claim must remain testable. New releases can show a different register, responsibility or performance strategy. A useful profile changes when evidence changes; it does not recycle one flattering adjective under every comeback photograph.

Distribution is evidence, not the whole verdict

Line and screen distribution can reveal patterns worth questioning, especially across several releases. A single timestamp still cannot explain tone, harmony, center function or the labor of supporting a formation. The profile uses counts to locate a question, then returns to the audible and visible choice. Fair representation means meaningful work, not mechanically identical seconds in every arrangement.

A multilingual hook needs more than novelty

Kep1er move among Korean and Japanese releases while members also bring Chinese and English-language routes into international promotion. Pronunciation, lyric fit and emotional intention deserve attention without demanding that every language sound native. A hook succeeds when rhythm and meaning survive the language choice; code-switching should not be praised automatically simply because a global group can perform it.

Performance chemistry lives between centers

A center moment matters partly because the surrounding members frame it. Eye lines, level changes and recovery timing guide attention before and after the obvious focal point. For Kep1er, this means contribution can happen while another person sings. The archive reads those ensemble decisions so “not in the center” never becomes shorthand for “not working.”

Growth requires a before and after

Calling every comeback an improvement makes the word useless. Growth should identify a changed skill, a more difficult responsibility or a decision executed with greater control than earlier evidence. Regression is also possible. The page compares like with like—live stability, phrasing, movement texture or camera command—rather than using maturity as a vague compliment attached to age.

A durable group needs durable pages

The member pages are reciprocal: each returns to the Kep1er hub, and the hub distinguishes current from former members. The “Yum” React links only its seven participants. That structure lets one roster correction propagate through navigation without cloning biographies or inventing a new version. Continuity on the site mirrors the editorial demand placed on the group: preserve history while making the present unmistakable.

Criticism can coexist with affection

The user recommends music she likes, so the React begins from genuine interest rather than a search for failure. Affection does not require pretending every runtime, edit or promotional choice is ideal. Specific criticism respects the performers more than empty protection does because it treats their work as strong enough to survive close listening and clear enough to support disagreement.

The next update needs an object

A teaser can announce direction, but a released song, official stage, credit list or dated notice supplies the evidence needed to revise this page. The archive will not turn silence into a rumor or a styling change into a career reinvention. It will update this canonical URL in place, keeping earlier participation visible beside the newest verified status.

What remains open

Kep1er have already survived the fixed-term ending that was supposed to define them, then moved from nine to seven to six. Longevity now depends on whether the continuing lineup receives music and promotion strong enough to make that survival artistically legible. The question is not whether the old group can be recreated. It is what only this current configuration can say.

Current members

Yujin — Choi Yujin (최유진). Born August 12, 1996. current leader, vocalist and performer. Her leadership connects the survival-show team to an experienced idol career, while her light rhythmic phrasing keeps bright hooks from feeling mechanically cute.

Xiaoting — Shen Xiaoting (沈小婷 / 션샤오팅). Born November 12, 1999. current member, dancer and solo-recording artist. Her ballroom-informed line, control and camera precision make spatial elegance a structural part of Kep1er performance. Her 2026 digital single “LEGEND” makes this one canonical artist/member page.

Chaehyun — Kim Chaehyun (김채현). Born April 26, 2002. current member and vocalist. Her centered tone gives dense arrangements a melodic spine, especially when a chorus needs lift without losing clarity.

Dayeon — Kim Dayeon (김다연). Born March 2, 2003. current member, dancer, rapper and vocalist. Her attack, rhythmic certainty and formation awareness let choreography read cleanly even when the song changes direction quickly.

Hikaru — Ezaki Hikaru (江崎ひかる / 에자키 히카루). Born March 12, 2004. current member, rapper and performer. Her compact power and elastic timing create impact without requiring the largest movement in the frame.

Huening Bahiyyih — Huening Bahiyyih (휴닝바히에). Born July 27, 2004. current member, vocalist and performer. Her clear tone and increasingly grounded stage presence give the group a calm line through busy concepts.

Former members

Youngeun — Seo Youngeun (서영은). Born December 27, 2004. former member, vocalist and performer. Her vocal force, humor and performance versatility were part of Kep1er from debut through the seven-member “Yum” video. Her March 2026 departure changes the current roster, not that recording.

Mashiro — Sakamoto Mashiro (坂本舞白 / 사카모토 마시로). Born December 16, 1999. former co-leader, vocalist and performer. Her calm co-leadership and precise ensemble work helped stabilize the original nine-member team through its fixed-term chapter.

Yeseo — Kang Yeseo (강예서). Born August 22, 2005. former member, vocalist and performer. Her expressive face and quick performance response gave early Kep1er concepts a vivid youngest-member point of view.

Official video tracker and local React

• Local in-depth Yum React
• Yum official videoDaily+2.5KTotal views9.3M
• Official current profile
• Official discography

Sources

• Official current profile and six-member group image
• WAKEONE notice index
• March 2026 roster statement reporting
• Sony Music Japan — Yum and Against the World release

RaeRae Reacts

TIPI-TAP: Kep1er Turned a Tiny Knock Into a Seven-Member Sugar Rush — exact playlist video gXCCiVqI_VQ.

RaeRae Reacts

Shooting Star: Kep1er Gave the Nine-Member Chapter a Real Goodbye — exact playlist upload VjOHYXzlZcM.

RaeRae Reacts

Grand Prix: Kep1er Took Nine Members Around the Track Without Losing the Chorus — exact playlist upload 4nAdvTkoP1Q.

RaeRae React image card

React image cards

Static cards route each exact official upload to its own in-depth React. Every card repeats that React’s featured and hero image so the archive stays visually traceable.