In 1998, Kobuchi and Kuroda met each other in Sakai. Kobuchi was a salesman at the time who made music as a hobby. Kuroda was a physical education teacher, who made and performed music on the street for fun. They became close friends and formed Kobukuro.
The first song they created together was Sakura, which was re-recorded in 2005. Kobukuro received moderately successful ratings for their first three indie albums - Saturday 8: PM (July 1999), Root of My Mind (March 2001), and ANSWER (December 2000). Kobukuro signed with Warner Music Japan in 2001, and made their debut with the hit single, Yell which reached #4 on the Oricon Charts. The duo won the coveted "Grand Prix" awards in December 2007 at the 49th Annual Nihon Record Taishou.
They have sung many songs for dramas, such as Aoku Yasashiku for the drama Dream Again.
They also collaborated with other artists. They have released 2 singles with label-mate Ayaka, Winding Road and Anata to.