Jeon Jeduk (전제덕) is a South Korean harmonica player who works on the chromatic harmonica in a jazz and crossover idiom. He was born on June 20, 1974, and Wikidata and Indonesian Wikipedia place his birth in Seoul. His own releases and Discogs spell his name Jeon Jeduk; Korean Wikipedia writes Jeon Je-deok, a 2017 London concert listing printed Jeduk Jeon, and the Korea JoongAng Daily has spelled it Jun Je-duk. He has made five albums, from 2004 to 2017, and the first of them won Best Jazz & Crossover Album at the 2nd Korean Music Awards in 2005. In November 2013 he was among the recipients of a Presidential Commendation at the Korean Popular Culture and Arts Awards. On September 15, 2026 he played Lotte Concert Hall in Seoul in a "Symphonic Harmonica" concert with the harmonica player Park Jong-sung and the Millennium Symphony Orchestra.

He lost his sight as a newborn. Korean press accounts say it happened about fifteen days after he was born, after a high fever damaged the optic nerves, and Korean Wikipedia gives measles as the cause. He entered Hyegwang School in Incheon, a school for blind and visually impaired students, in 1980 and joined its wind band as a drummer. When the band was dissolved in his first year of middle school he moved to the janggu, the hourglass drum, in samulnori, the Korean percussion tradition. A 2005 Lady Kyunghyang profile says a history teacher introduced him to samulnori, that he practised five or six hours a day after lessons, that he played with a Korean orchestra in 1988, won a special award at the World Samulnori Competition in 1989 and took the grand prize and most-valuable-player title there in 1993. He met the samulnori master Kim Duk-soo when Kim judged the 1989 competition, and in 1996 he joined Kim's Nanjang Music.

That same year he heard the Belgian harmonica player Toots Thielemans on the radio and set out to teach himself the instrument. The Korea JoongAng Daily wrote in 2013 that the broadcast moved him to tears and that he learned by listening, wearing out CDs and about one harmonica a month. He told Lady Kyunghyang in 2005 that he cannot read sheet music and had no teachers: he learned by ear, copied chord progressions and then began arranging pieces himself. The pianist Kim Kwang-min encouraged him to take it up professionally, and he began working as a harmonica player in 2001. He told TenAsia in 2014 that Stevie Wonder was what first made him want to make music and that Thielemans became his role model.

By the time his first record came out he was already a sought-after guest. The 2005 profile names Cho Sung-mo, Cho Kyu-chan, Lee Juck and Kim Jung-min among the singers whose albums he had played on, and the release notes for his debut add Park Sang-min and BMK and the film soundtracks Tube (튜브) and Ttong-gae (똥개). The debut itself came out in October 2004 on JNH Music. The record is billed simply as 전제덕, Discogs files it as 1집 ("first album") and Apple Music lists it as Je Duk Jeon; Korean sources often call it 우리 젊은 날 ("Our Young Days") after its title track. Lady Kyunghyang called it the first all-harmonica popular music album in Korea. Its twelve tracks run through pop, Latin, ballad, bossa nova, funk and jazz, and include "Fading Autumn" (가을빛 저무는 날) with the singer BMK and a vocal version of "My Harmonica" (나의 하모니카). On March 22, 2005 it won Best Jazz & Crossover Album at the 2nd Korean Music Awards, and he gave his first solo concerts that month, on March 19 and 20.

His second album, What Is Cool Change, followed in December 2006 (Seoul Records and Music Nine, SRCD-3933). Its release notes call it "hybrid soul": funk and soul, New Orleans funk, acid soul and shuffle, with wah-wah, flanger and overdrive effects on the harmonica, guest parts for the singer Bobby Kim, the pianist Kwak Yoon-chan, the hip-hop artist IF and the vocal group Heritage with a choir of about thirty, and remakes of the Beatles' "Lady Madonna" and Sting's "It's Probably Me." A Kyeonggi Ilbo preview of his August 6, 2007 concert at Pyeongchon Art Hall, titled "Harmonica Story," described a band of thirteen with a large brass section and a chorus, and a harmonica run through effects; his earlier concerts, it said, had been acoustic only. He told Lady Kyunghyang in 2008 that the album had sold poorly, which he put down to listeners' taste, and that he expected it to be appreciated later.

The third record was a set of remakes. Another Story: Hanguk Saram (한국사람) came out in November 2008 on JNH Music and Universal Music Korea: twelve Korean pop songs from the 1970s to the 1990s that he chose himself, among them Lee Moon-sae's "Gwanghwamun Yeonga," Yoo Jae-ha's "Ugulhan Pyeonji," Yang Hee-eun's "Sarang, Geu Sseulsseulham-e Daehayeo" and the Sinin-gwa Chonjang song "Gasi-namu." "Hanguk Saram" was originally a harmonica piece played by the singer Kim Hyun-sik; here it carries lyrics sung by Kim Wan-je, Kim Hyun-sik's son. The closing track, "Seommaeul Seonsaengnim" (섬마을 선생님), was chosen because it had been a favourite of his mother, who had died the previous November.

In April 2010 he and the gypsy-jazz guitarist Park Joo-won released a digital single of the "James Bond Theme" in a gypsy-jazz arrangement by Park, the piece that Kim Yuna skated to in her short program at the Vancouver Winter Olympics. On March 13, 2010 he played with the Millennium Symphony Orchestra at the Seoul Arts Center, and in November 2010 he toured Israel with the vocalist Malo; the Daehak Journal reported in 2011 that they were the first Korean musicians to tour there and that their concerts in four cities, including Tel Aviv and Jerusalem, sold out. Malo's 2010 album Dongbaek Agassi ("A Lonesome Camellia") carries his harmonica on two tracks, and he had already played on three tracks of her 2003 album Cherry Blossoms Are Gone. On January 4, 2013 he played "Rhapsody in Blue" at a New Year's concert at the Seoul Arts Center; a Korea JoongAng Daily columnist wrote that the harmonica sounded as strong as a clarinet. A London Korean Links listing says he was the first Korean harmonica player to give a solo concert with a sixty-piece orchestra, at the Seoul Arts Center in May 2012. On November 18, 2013 the Ministry of Culture, Sports and Tourism's popular-culture awards named him among seven recipients of the Presidential Commendation, and the ceremony programme listed him in a joint performance for the singer Patti Kim, with the guitarist Ham Chun-ho and the singer Song Ji-eun.

Dancing Bird (JNH Music, March 24, 2014) is his third album of original material, released seven years and four months after its predecessor according to TenAsia. The title track, the waltz "Spring Waltz" (봄의 왈츠), is a piece he said he wanted to play softly, at about sixty percent of his full strength, so that the harmonica would sound like a singer rather than a cold instrument. The pianist and composer Jung Won-young and the guitarist Park Joo-won contributed compositions, Park plays on "Hanghae" and the pianist Song Young-joo on "Meolli Isseodo," Jeon wrote three of the tracks himself, and the guitarist Jung Su-wook produced. The record closes with Stevie Wonder's "Come Back as a Flower." A release concert was announced for April 19, 2014 at the LG Arts Center in Seoul.

In June 2013 he was announced for a two-night joint concert at Muse Live in Seoul with the guitarist SAZA Choi Woo-jun, whom he had met on a music volunteer trip to Nepal the year before. The guitarist appears on And So It Goes (JNH Music, June 12, 2017), his fifth album by the release notes' count, which turns eleven pop, jazz and classical pieces into harmonica features. It includes George Benson's "Breezin'," Sting's "Englishman in New York" as Latin jazz led by percussion, Herbie Hancock's "Chan's Song," Dire Straits' "Why Worry," the Russian folk song "Dark Eyes" as gypsy swing with the violinist KoN, Elton John's "Daniel" as a bossa nova and, at the end, Billy Joel's title song. The drummer Han Woong-won arranged every track and co-produced with Jeon. A release concert was announced for August 26, 2017 at the Mapo Art Center in Seoul. The same year he was billed to play the opening concert of the 12th Jeju Forum on May 31 and PizzaExpress Jazz Club in London on September 27, the latter with Park Joo-won. A London listing for that date says that in 2016 he became the first Korean musician chosen as a Hohner Artist by the German harmonica maker.

His recent activity includes the 2019 white-vinyl issue of the debut album on Machang Music & Pictures, a guest part on a single by the group Alquimista released on May 29, 2026, and the "Symphonic Harmonica" concert of September 15, 2026, which Nocut News described as drawing a strong audience response. It paired his band and the orchestra in "Secret Love," the theme from The Umbrellas of Cherbourg, Bach's "Siciliano," the Pink Panther theme and his own "Dancing Bird" in a samba arrangement, then a joint set with Park Jong-sung that included "Autumn Leaves" and Chick Corea's "Spain." For an encore he sang Stevie Wonder's "Isn't She Lovely."

Thielemans and Wonder are the two names he gives himself. The first showed him what a chromatic harmonica could do in jazz, and the second is a recurring presence in his repertoire, from "Come Back as a Flower" on Dancing Bird to the encore of September 2026. He came to the harmonica as a percussionist, and reviewers of his concerts, including the Nocut News writer in 2026, point to explosive improvisation and a feeling of han, the Korean sense of sorrowful longing, in his sound.

He has said he wants the harmonica to be heard as more than a sad instrument. In his 2008 Lady Kyunghyang interview he put the idea of the harmonica as a mournful melody down to Korea never having had a jazz harmonica player, and called it a "mouth keyboard" that can carry a solo. In 2014 he spoke of wanting a lyrical, melodic tone like his debut's rather than the funky style he also plays. The records show that range: acoustic Latin and ballad playing on the debut, funk and soul with effects on What Is Cool Change, Korean pop standards on Another Story, waltz, samba and bolero writing with strings on Dancing Bird, and gypsy swing and bossa nova on And So It Goes.

His jazz standing is clear but not exclusive. Discogs files his first two albums under Jazz (the debut with the style Fusion), his 2014 and 2017 albums are filed under Jazz on Bugs, and the Korean Music Awards honoured his debut in their jazz and crossover category. Bugs classes some of his other albums as R&B and soul or as new age, and a large part of his public profile comes from guest harmonica on pop, rock and hip-hop records, so the crossover label is the accurate one.