Seo and Han

For the Taiwanese township, see Changbin, Taitung. In this Korean name, the family name is Seo. Changbin Changbin in January 2026 Born Seo Chang-bin August 11, 1999 (age 26) Yongin, Gyeonggi Province, South Korea Other name SpearB[a] Occupations Rapper, singer, song writer, record producer, composer Years active 2017–present Works Songs written Musical career Genres K-pophip hopelectronica Instrument Vocals Label JYP Member of Stray Kids3Racha Korean name Hangul 서창빈 RR Seo Changbin MR Sŏ Ch'angbin Signature

Seo Chang-bin (Korean: 서창빈; born August 11, 1999) known mononymously as Changbin, is a South Korean rapper, singer, songwriter, and record producer. He is a member of the South Korean boy group Stray Kids, formed by JYP Entertainment in 2017. He is also a member of 3Racha, an in-house production team and sub-unit of Stray Kids.[1]

Besides his contributions to Stray Kids, Changbin participated as a contestant in Show Me the Money 9 and has collaborated with various artists, including Yoon Ji-sung, Thai rappers F.Hero and Milli. Changbin became a full member of the Korea Music Copyright Association in February 2023.

Early life and education Seo Chang-bin was born on August 11, 1999, in Yongin, South Korea. He graduated from Bora High School [ko] and studied at Gukje Cyber University in the Department of Entertainment.[2][3]

Career Pre-debut: 3Racha and Stray Kids reality Main article: Stray Kids Changbin joined JYP Entertainment through an audition where he danced to a self-produced song.[4] During his trainee period, Changbin teamed up with fellow JYP trainees Bang Chan and Han to form the underground rap group 3Racha, releasing multiple mixtapes under the pseudonym SpearB, without the company's knowledge.[5] They uploaded their first mixtape, J:/2017/mixtape, consisting of seven tracks, to SoundCloud.[6]

In 2017, Changbin participated in JYP's survival show Stray Kids and was confirmed to debut with eight other contestants.[7] Throughout the show, he demonstrated his rapping and music composition skills, with several of his written songs included in the pre-debut EP Mixtape.[8]

2018-present: Stray Kids and collaborations Main article: Stray Kids Changbin officially debuted with Stray Kids through a debut showcase and the EP I Am Not on March 25, 2018.[9] He participated in the composing and writing for the songs in the EP.[10]

In February 2019, Changbin featured on "You... Like the Wind", a side track from Yoon Ji-sung's debut album.[11] In 2020, Changbin participated as a contestant in Show Me the Money 9.[12] He passed the 1st Round but eliminated in the 60 Seconds Team Trial.[13] He went viral for his Jutdae (Korean: 줏대; lit. 'principles; strong spine; backbone') meme,[14] which featured in an advertisement of Samsung Galaxy three years later.[15]

On October 28, 2021, Changbin featured on the song "Mirror Mirror" by Thai rappers F.Hero and Milli.[16] The song won Best Collaboration awards from Thailand's Toty Music Awards and The Guitar Mag Awards.[17][18]

In February 2023, Changbin, along with his fellow 3Racha members Bang Chan and Han, was promoted to regular membership in KOMCA and, as of April 2025, has credits for 181 songs.[19][20]

On October 15, 2024, Changbin was featured on the song "VAY" from Itzy's ninth EP Gold, for which he also wrote the lyrics and composed the music.[21] In September 2025, he featured on "R&B Me" by Jun. K from the EP Dear My Muse.[22]

In this Korean name, the family name is Han. Han

Han in January 2026 Born Han Ji-sung September 14, 2000 (age 25) Incheon, South Korea Other name J.One Occupations Rappersingersongwriterproducer Works Songs written Musical career Genres K-pophip hopelectronicaR&B Years active 2017–present Label JYP Member of Stray Kids3Racha Korean name Hangul 한지성 RR Han Jiseong MR Han Chisŏng Signature

Han Ji-sung (Korean: 한지성; born September 14, 2000), known as Han, is a South Korean rapper, singer, and songwriter. He is a member of the South Korean boy band Stray Kids and its production unit 3RACHA under JYP Entertainment.

Han has been a full member of the Korea Music Copyright Association since February 2023, becoming the youngest K-pop idol to be awarded such membership. As of May 2025, he has registered 174 songwriting and production credits, including works for NiziU, Show Lo, Yao Chen, JO1, Nexz, and MODYSSEY, as well as collaborations with artists such as Lil Durk, Sky-Hi, Tiger JK, and Lisa.[1]

Early life and education Han Ji-sung was born on September 14, 2000, in Incheon, South Korea as the youngest of two sons. His family moved to Mokpo when he was very young, and he attended elementary school there. Later, his family relocated to Malaysia,[2] where he briefly attended Fairview International School before leaving to be homeschooled.[3][4]

At fourteen, Han returned to South Korea intending to audition to become a K-pop idol, while also committing to pass all three levels of the Korean Qualification Exam [ko] as part of a promise to his parents that he would return to Malaysia to pursue further education if he was not successful at auditioning within twelve months.[3][4] Three months after he had returned to South Korea, Han initially auditioned for JYP Entertainment and following a second audition, was accepted as a trainee.[5][6]

After debuting, Han enrolled at Gukje Cyber University, to study performance and broadcast entertainment.[7][non-primary source needed]

Career 2017–present: Stray Kids and 3RACHA Main article: Stray Kids While a JYP Entertainment trainee, Han attended Def Music Academy in Gangnam District.[8][9][better source needed][10] He co-founded 3RACHA with bandmates Bang Chan and Changbin after they took MIDI classes together.[11][12] Formed in 2016, they serve as the primary production team for Stray Kids, contributing significantly to the group's musical output.[13][14][15]

Prior to making their official debut, 3RACHA released three mix-tapes on SoundCloud: J:/2017/mixtape on January 18, 2017.[12] The second mix-tape, 3Days on August 16, 2017, featuring Han's solo track, "I See", under the alias J.One,[11][16] and, Horizon on December 21, 2017.[17] Several pre-debut songs were later reworked as Stray Kids' B-sides.[18]

In the later half of 2017, Han participated in the reality competition series Stray Kids.[19] Han officially debuted with Stray Kids on March 25, 2018, with the debut extended play (EP) I Am Not.[20] 3RACHA made no further releases on SoundCloud until the release of the song "Carpe Diem" on January 18, 2020 to commemorate their third anniversary.

In February 2023, alongside fellow members of 3RACHA, Han was promoted from associate to full member of the Korea Music Copyright Association (KOMCA),[21][22] making him, at age 22, the youngest K-pop idol to be awarded membership.[23][24] As of September 17, 2025, Han has credits for 186 songs registered with KOMCA. This places him behind bandmates Bang Chan and Changbin within the ranks of fourth-generation idols, and among the top ten most credited K-pop idols overall. He is also the eighth-most credited K-pop idol overall.[25][26]

In summer of 2024, a year ahead of its expected expiration,[27] it was announced that alongside his bandmates, Han had renewed his group contract with JYP Entertainment.[28][29]

2019–present: Solo and subunit activities In 2019, Han appeared on episode 197 of King of Masked Singer, competing under the alias Imgeokjjeong.[6][30] In October 2022, he appeared on episode 32 of LeeMujin Service where he performed a jazz-inspired remix of Stray Kids' then-new release "Case 143", as well as songs by Twice, YB, and Se So Neon.[31]

Individually, Han has participated in special performances for Korean music festivals, including a cover of SSAK3's "Play That Summer" with Lia of Itzy and Juyeon of The Boyz at MBC Music Festival 2020,[32][33][34] and a cover of Kim Sung-jae's "As I Told You" with bandmates Hyunjin and Felix at KBS Song Festival 2022.[35]

As part of 3RACHA, Han has performed with N.Flying at 2019 KCON LA,[36][better source needed] and on a remix of their pre-debut track "Runner's High" at 2019 KCON Thailand with Soyeon of (G)I-DLE and Hongjoong of Ateez.[37][better source needed][38][unreliable source?] 3RACHA have also given numerous performances, whether as an introduction, outro, or act independent of wider Stray Kids sets at the MAMA Awards, including a special stage at MAMA 2022 with Tiger JK and Jung Jae-il.[39][40]

In February 2022, 3RACHA announced their first official guest single "Just Breathe", a collaboration with Japanese rapper SKY-HI.[41][42] In September 2022, 3RACHA composed the track "Heyday" for the fourth soundtrack compilation of Street Man Fighter.[43]

After a minor car accident which prevented the full Stray Kids lineup from originally performing as intended,[44] Han made his first international festival appearance as part of 3RACHA at the Global Citizen Festival 2023 in New York City.[45]

In April 2020, Stray Kids sang the soundtrack for the anime adaptation of Tower of God, with 3RACHA writing and composing for the opening theme "Top" and Han himself writing and composing for the ending theme "Slump".[46] In October 2024, Stray Kids were invited back to create theme music for the second season of Tower of God, with Han co-writing and co-composing the opening theme, "Night".[47][48] In July 2020, all members of 3RACHA received writing and composition credits on Stray Kids' second domestic television OST, "Hello Stranger" for the drama Pop Out Boy!.[49] In 2023, "Maniac" and "Venom" (written and produced by 3RACHA, and from Stray Kids' sixth EP, Oddinary) were featured in the first season of XO, Kitty.[50]

In April 2024, as part of 3RACHA, Han co-produced Stray Kids' first OST for a Japanese drama, "Why?" for Fuji TV's RE: Revenge – At the End of Desire.[51][52] In July 2024, 3RACHA co-wrote and co-produced the Stray Kids song "Slash" for the Deadpool & Wolverine soundtrack, marking Han's first contribution to the soundtrack of a Hollywood cinematic release,[53][54] and his second major film OST after 3RACHA were approached to produce a theme song for Doraemon: Nobita's Sky Utopia. In September 2024, it was announced Stray Kids would perform "Come Play" with Tom Morello of Rage Against the Machine and Young Miko for the second season of Arcane.[55]

In April 2025, it was announced Han had co-written a song for label-mates Nexz, "Run With Me", to be released on their second mini album, O-RLY?.[56][57]

SKZ-Record/Player and solo music After debuting, Stray Kids began a YouTube-based non-album singles project, SKZ-Record/Player, where individual members could upload solo and/or sub-unit original songs, cover versions, or dance performances, exploring their own artistic expression beyond the group's collective style.[16] As of August 2024, Han was the most prolific contributor to the project, with eleven original solo songs (in release order: "Close"; "I Got It";[58][59] "Alien";[60] "Wish You Back";[61] "Happy";[62] "Volcano";[63][64][65] "Miserable (You & Me)";[66] "13";[67] "Maybe"; "Human";[68] and "Hold My Hand"[69]), three original sub-unit songs ("Zone", as part of 3RACHA; "Want So Bad", a duet with bandmate Lee Know;[70] and "Respirator",[71] a duet with bandmate Seungmin), one original duet with Bae of Nmixx ("1, 2, 3, 4, 5"),[72] and two cover versions (both with bandmate Seungmin and both of songs by Day6).[73] He was also credited as the lyricist and co-composer of "Hold On", recorded for the project by Seungmin.[74]

Six of these, plus a further, previously unheard solo song, "Run", were released to digital platforms as part of Stray Kids' digital compilation album, SKZ-Replay, in December 2022.[63] As of July 2024, the remainder had yet to see wider release, though "Respirator" was performed in March 2024 on the final day of Stray Kids' fourth fan-meeting, SKZ Magic School. "Hold My Hand", first performed in August 2024 as part of Stray Kids' DominATE tour in Seoul, was later released as part of Stray Kids' special album, Hop, in December 2024, with an accompanying music video released to the band's SKZ-Record/Player YouTube project.[75][76] In March 2025, as part of Stray Kids' digital single album Mixtape: Dominate, Han and Felix released a duet, "Truman";[77] an accompanying music video was released on the Stray Kids YouTube channel.

As of April 2025, Han has had several additional songs which had neither been released to SKZ-Record/Player nor to wider digital platforms, including "Scissor", which was performed at the Unite ON: Hallyu Festival in 2020, and "Don't Say", which was performed during Stray Kids' 5-Star Dome Tour in 2023, where Han played guitar during concert for the first time.[78][79]

Soundtrack appearances In October 2025, it was announced that together with bandmates Felix and I.N, Han would feature on the soundtrack for Netflix original series, Genie, Make a Wish, with the song "Genie".[80][81][82][83] The song debuted at number 147 on the Circle Download Chart,[84] and reached number 4 on the Billboard World Digital Sales chart.[85] Later the same month, it was announced that Han would be releasing his first solo original soundtrack, "Updraft" (상승기류), for TvN's period drama Typhoon Family, on October 26, 2025.[86][87][88] The song debuted at number 92 on the Circle Download Chart,[89] number 68 on the Circle Background Music [BGM] Chart,[90] and number 65 on the Circle V Coloring Chart.[91] In 2026, he performed "Let It Show" in the third season of drama series Yumi's Cells.[92]

Artistry Media coverage has highlighted aspects of his live performances, including stage presence and choreography.[93][94][95][96][97]

Han plays piano and guitar.[78][96] He contributes to songwriting and production for Stray Kids' releases.[16][23][98]

Han has appeared in various rankings, including Tumblr's annual K-Pop Stars of the Year lists from 2018 onward,[99][100][101] sixth place on Billboard's 2024 K-Pop Artist 100,[23] and, as part of Stray Kids, selections for Forbes Korea's 30 Under 30,[102] Gold House's A100 list,[103] and Time's Next Generation Leaders.[104] In a 2022 article for We Got This Covered, Demi Phillips included Han on a list of the 10 best male K-pop singers of all time.[105]

Songwriting and production Han has composed music across various genres[106][107] and melodic styles.[12][16] He has written lyrics and composed songs for Stray Kids,[108] including unreleased tracks. He has stated that he once had around 40 archived songs that no longer aligned with his artistic development.[citation needed]

Han has described initial challenges in organizing songwriting ideas, noting that experience helped him develop concepts more fluidly.[12][109][110] His inspirations include films, anime, and reality television.[98][111] The song "Wish You Back" was inspired by the 2016 film Your Name;[111][112] its director, Makoto Shinkai, called the track "beautiful".[113][114] In 2024, during an appearance on MMTG, Han discussed interest in writing a sequel to "13" following the real-life reunion of the couple from EXchange who inspired it.[115]

Han's lyrics address themes of love and introspection[70][116][117][118] through techniques such as wordplay, storytelling, mood, and symbolism.[62][65][108][119] In a review of Stray Kids' album Noeasy for NME, Carmen Chin described "Secret Secret", which Han wrote and composed, as "lyrically stunning".[18]

Following Stray Kids' performances on Kingdom: Legendary War, the production sub unit 3RACHA, which includes Han, received attention for their arrangements of "Pray (I'll Be Your Man)" (originally by BTOB) and "Jasin", a mashup of the group's songs "God's Menu" and "Side Effects".[25][120] Han has stated that he aims for Stray Kids to "become a genre" unto themselves.[110][121] Stray Kids are recognized as a self-produced group,[29] with media noting their role in the "mala (taste)" genre[14] and trends in fourth-generation K-pop.[12][29][122]

Han has directed vocals for several Stray Kids releases, emphasizing each member's individual qualities over rigid adherence to his initial concepts.[107]

In addition to Stray Kids' material, Han has co-written and produced tracks for other artists, mainly those affiliated with JYP Entertainment. These include the Chinese artists Show Lo, Yao Chen, and members of JO1,[123] and the group NEXZ.[124] The track "Paradise" by Japanese girl group NiziU, produced by 3RACHA and used as the theme for the 2023 film Doraemon: Nobita's Sky Utopia,[125][126] was the first 3RACHA production to reach number one on the Japan Hot 100.

Rapping and vocals Han's rapping has been characterized in media as "spitfire".[98][127][128] He has been listed among the fastest rappers in South Korea.[127]

After Stray Kids' original main vocalist left the group in 2019, Han assumed more of the group's singing responsibilities. His vocals have received media attention.[16][30][129] Coverage has noted his vocal range, including high notes,[31][98] falsetto,[130] and belting.[98][130][25][86][131]

Influences and influence Han's rapping draws from artists such as Tablo of Epik High,[98][132] Zico of Block B,[98] and Tiger JK,[107] as well as BTOB's rap line. His father was a rock musician,[16] which led Han to appear on programs such as Lee Mujin Service[128] and King of Masked Singer.[5] Han has expressed interest in band music,[109] including rock subgenres and acts such as J-Rock groups One Ok Rock and Mrs. Green Apple,[133] the Australian band 5 Seconds of Summer, the Italian group Måneskin, and South Korean rock bands YB, DAY6,[73] and Silica Gel. He has also incorporated R&B, bossa nova, and jazz into his solo work.[16][106]

Other artists have cited Han as an influence, including Sunwoo of The Boyz,[134] Jongseob of P1Harmony,[135] Alan Pasawee of the Thai group Bus,[136] Kunho of All(H)Ours,[137] Hyui and Seita of the Japanese group Nexz,[138][139] and contestant Lee Do-Ha from Make Mate 1.[140]