Lim Jae-beom (; born January 6, 1994), better known as Jay B and formerly JB, is a South Korean singer and songwriter, best known as a member and leader of South Korean boy band Got7.
He got interested in musical composition when he was a b-boy, but started writing songs only after joining JYP Entertainment in 2009: he was first credited as a lyricist for the song "Bad Behaviour" from Got7's 2014 extended play Got Love. In 2016, he became more involved in composition and adopted the pseudonym Defsoul, which was shortened to Def. the following year.
Songs All song credits are adapted from the Korea Music Copyright Association's database, unless otherwise noted.
2012–2016 YearArtistTitleAlbumLyricsMusicCreditedWithCreditedWith2012JJ Project "Na Na Na" (Ver. MM Choice) (나나나MM Choice Part. 2 2014Got7"Bad Behaviour" (나쁜 짓)Got Love 2015"Mine"Just Right"Everyday" (매일)Mad Winter Edition2016"Fish"Flight Log: Departure"Something Good""Home Run""Skyway"Flight Log: Turbulence"Prove It""Dreamin'" (니꿈꿔)"If I Never Let You Go…" (離さなければ…)Hey Yah!Def."Holic"1/? vol. 1"Don't Worry""Sin" "Lost""Bad Habit"
2017 ArtistTitleAlbumLyricsMusicCreditedWithCreditedWith Got7"Shopping Mall"Flight Log: Arrival"Go Higher""Q""Meet Me" My SwaggerJJ Project"Tomorrow, Today" (내일, 오늘)Verse 2"On & On""Icarus""Don't Wanna Know""Find You""Fade Away"Got7"Teenager"7 for 7"You Are""Turn Up"Turn Up"Why"
2018 ArtistTitleAlbumLyricsMusicCreditedWithCreditedWithDef."Think of You"1/? vol. 2"Channel" "Pray"Got7"One and Only You" Eyes On You"Look"JB"Rainy"Hyena on the Keyboard Part. 4Got7"Shining On You"The New Era"Hmmmm"JB"Higher"ColorsGot7"Enough"Present: You"Save You" (지켜줄게)"Sunrise"Def."Sometime"1/? vol. 3"Be With You""Don't Care""Island" "Blind" Got7"Come On" (안 보여)Present: You & Me"1:31AM" "Think About It"
2019 ArtistTitleAlbumLyricsMusicCreditedWithCreditedWith Got7"Reborn"I Won't Let You GoJus2"Focus on Me"Focus"Drunk On You""Touch""Senses""Breath" (吐息)Focus (Japan Edition)Got7"Eclipse"Spinning Top: Between Security & Insecurity"Page"Offshore"Surfin" Scene #1"Laze" "Play" Got7"Your Space"Love LoopDef."Something Special"1/? vol. 4"Desire""Deeper""Runaway""Stopline" Got7"You Calling My Name" (니가 부르는 나의 이름)Call My Name"Pray""Thursday"Def."Ring"1/? vol. 5"Diary""Nothing""Curiosi""Come Back to Me"
2020 ArtistTitleAlbumLyricsMusicCreditedWithCreditedWithOffshore"Simple" Scene #2"Smoke" (연기) "Take a Walk" Got7"Crazy"Dye"Ride"Offshore"Just Stay" Cut #1"Sweet Dream" Jeebanoff"Callin" Good Thing (Remix)Got7"Last Piece"Breath of Love: Last PieceWavycake, Ovus"Dream" (꿈) REALusion$ün"In December (Sad Night)" (12월엔 (Sad Night)) White
2021 ArtistTitleAlbumLyricsMusicCreditedWithCreditedWithOffshore"Cold Night" Scene #3"Call Me" (전화해) Jay B"Switch It Up" s/s"Memory" SeesawJay B"B.T.W" SOMO:Fume"AM PM" "Fame" "In To You" "Count on Me""Paranoia""I'm Surfin' (Gangneung & Yangyang)"Feel the Rhythm of Korea Pt. 1Def. & Fudasca "Is It A Dream?"Mirani"P.S." Uptown GirlOurealgoat"Thought of You" (생각했어) Junny, Jay B "Nostalgia"Nostalgia
2022 ArtistTitleAlbumLyricsMusicCreditedWithCreditedWithDef. "Again" Love."Why?" (왜그래?)"I Just Wanna Know""Like a Fool" (바보같이) "Want U""Sunset With You" NXPS "Night" Bigone"Windy Day" (바람이 나를 안을 때)BIGONEISTHENAMEGot7"Truth"Got7"Nanana""Don't Leave Me Alone"H1ghr Music"BRB"Skinny Brown, Kim Seung-min, Jay B, Big Naughty"Lone Wolf (3:00 AM)" (풀리지 않는 고민) (3:00 am)Listen-Up EP.3SMMT"I'll Be Fine" (feat. Jay B)Mr. HollywoodJay B"Go Up"Be Yourself"Break It Down" "Livin'""The Way We Are""Fountain of Youth""Holyday"Jomalxne feat. Jay B "GZRGH" (꺼지라고해)Sky WalkerDef."My Bad"Abandoned Love."Calm Down""My Abandoned Love""Not Easy""Right" (맞아)"You Say""Will Spring Come?" (봄이 올까?)
2023–present ArtistTitleAlbumLyricsMusicCreditedWithCreditedWithSoulbysel, Def. "About You"Soulbysel Compilation 04Jay B"One Moment" (잠시만)Seasonal Hiatus"Whiskey""Wonder"Offshore"Favorite" Scene #4"Bada" "Hell of a Life" DXTEEN"Snowin'"Jay B"Baby"Archive 1: [Road Runner]"If You""Make Me Right""Chosen""Take it Easy""Crash""Preview""°C (Temperature)" (온도)"Right Back""Inside""Cloud Nine""Present""Winter Night"Got7 "Darling" Winter Heptagon "Yours Truly," (우리가할수있는말은.) Jay B"Hold Onto My Back"TR.EE "Layback" "Overflow" "One Call Away" "Time" "We" Def. "Intro" 2018.12.25 "Anybody" "N" "Boy" "City" "Well" "Misty" "I Can't" "Cold"
References