Sukyung Kim is a pianist, composer and improviser who was born in Korea and is based in Brooklyn, New York. She leads one record, Lilac Hill, a five-track self-released EP issued on May 10, 2020, and she plays keyboards on two 2022 releases by other New York bandleaders. No source names her birthplace within Korea or gives a Hangul spelling of her name, and the only birth year anywhere is the 1992 shown on her All About Jazz musician page.

The Korean side of her story is thin, and it helps to say so plainly. She was born in Korea, and every documented step of her training and career took place in the United States. WXXI's review says the closing track of Lilac Hill, "California", was written about her childhood there. Her own website and the Mark Morris Dance Group's artist page both describe her as Korean-born and New York based, and none of the sources states her citizenship or describes a performance, release or teaching post in Korea. What ties her to the Korean scene is her birth, her 2021 Korean Music Awards nomination and her recording partnership with the South Korean drummer Jongkuk Kim, who is on every track of her record.

She began classical piano as a small child; her own biography says at five, while All About Jazz and WXXI say four. She studied classical piano and composition at the State University of New York at Binghamton, and WXXI says she was still working in the classical realm there. By the time she entered New York University for a master's degree her focus had moved to jazz, and All About Jazz describes the degree as graduate studies in jazz performance. Her teachers, by her own biography and those two outlets, were the pianists Alan Broadbent and Kevin Hays, the bassist Drew Gress and the drummer Ari Hoenig. She says she found jazz through the playing of Wynton Kelly, Keith Jarrett and Brad Mehldau.

Lilac Hill was recorded on May 17, 2019 at Dolan Studio in New York and released a year later, on May 10, 2020. Kim produced it and wrote all five pieces, playing acoustic piano and Fender Rhodes in a quintet with the alto saxophonist Ethan Helm, the guitarist Paul JuBong Lee, the bassist Luca Alemanno and Jongkuk Kim on drums. Hai Li engineered it, Tyler McDiarmid mixed and mastered it, and Yunjei Cho made the cover art. The pieces run "Lilac Hill" (4:25), "Stargazers" (8:09), "Bluebird" (5:06), "Summer Days" (5:46) and "California" (6:55), about thirty minutes in all. On her release page she calls the compositions a private record of feelings and images and says she hopes they reach anyone going through hard times.

The EP was reviewed widely in its first year. Friedrich Kunzmann of All About Jazz, on May 13, 2020, praised the balance of sophistication and creativity and wrote that she had what it takes to become an important voice in contemporary jazz. Mike Jurkovic reviewed it for the same site on July 2, 2020. Ron Netsky of WXXI called it an impressive debut on October 1, 2020, and Take Effect Reviews scored it 8 out of 10 that month. O's Place Jazz rated it 74 in its fusion category on May 11, 2021.

It also reached Korea's own awards. The 18th Korean Music Awards, held on February 28, 2021 and covering albums released between December 1, 2019 and November 30, 2020, listed Lilac Hill among the six nominees for Best Jazz Album. The prize went to Malo for Song Changsik Song Book, and the other nominees were Soojin Suh, Cho Yoon-seung with Kim Sung-won, Seo Bo-kyung and Jung Sumin.

She has since worked as a sideperson. On the Brazilian bassist Marcelo Maccagnan's self-released Night Tales (July 29, 2022) she is listed on keyboards alongside the guitarist Andrew Cheng and the drummer Maxime Cholley, with the vocalist Simona Smirnova guesting on the opening track. On the guitarist Owen Chen's four-track EP Eternal (2022) she plays piano with the saxophonist Sunhyun Yoo, the bassist Sean Hannon and the drummer Joshua Roberts, and O's Place Jazz names the title track as the one that features her. No later release under her own name was found. Her biography says she continues to write, perform and teach in Brooklyn, and the Mark Morris Dance Group's website carries an artist profile for her that repeats it.

No interview in which she discusses her influences was found, so this section sticks to her own biography and what reviewers heard. She names Wynton Kelly, Keith Jarrett and Brad Mehldau as the pianists who opened jazz to her, and WXXI says "Summer Days", on which she switches from piano to Rhodes, is a tribute to Jarrett.

Reviewers describe a modern, melodic style. Kunzmann hears classic swing and post-bop language over modal harmony in "Stargazers", Latin-jazz feeling in "Bluebird" and, once she moves to Fender Rhodes on "Summer Days", a fusion light that recalls Chick Corea. Jurkovic calls the playing airy and traditional, with a lean sense of swing and a neo-bop lounge sound, and WXXI notes that the title track unfolds a long melody over a complex 5/4 pulse and was inspired by a dream. O's Place files the record under fusion and Discogs under contemporary jazz. The title track states its melody through guitar and alto saxophone in unison, and the closing "California" fades out on fuzzy guitar lines over Rhodes layers and a plain, groovy drum pattern.

Her classical training is part of her biography, but every reviewer places the music inside jazz, and no source suggests a pop, rock or classical career alongside it.