Kim Nam-joon (Korean: 김남준; born September 12, 1994), better known as RM (formerly Rap Monster), is a South Korean rapper, songwriter, and record producer. He is best known as the leader and rapper of South Korean boy band BTS. As a solo artist, he has released two mixtapes: RM in 2015 and Mono in 2018. The Korea Music Copyright Association attributes over 170 songs to RM as a songwriter and composer, including his fellow BTS members solos. RM has also written music for his various features, and two songs for former Big Hit Entertainment labelmate Glam prior to their disbandment. On December 2, 2020, he debuted at number three on Billboard's Hot 100 Songwriters Chart. As of May 2021, he has 173 KOMCA credits, making him the fourth and youngest most-credited songwriter in KOMCA's history.