Career
Sanfrecce Hiroshima
Born in Samcheok, Lee Dae-heon signed for Sanfrecce Hiroshima of the J. League Division 1 in January 2012. Lee Dae-Heon then made his professional debut for Hiroshima in the AFC Champions League on 13 March 2013 against Beijing Guoan at the Workers Stadium in Beijing. He came on as a 68th-minute substitute for Kohei Shimizu as Sanfrecce Hiroshima lost the match 2–1.
= V-Varen Nagasaki (loan) On 3 January 2014 it was announced that Lee Dae-heon had been loaned out to J. League Division 2 side V-Varen Nagasaki.
He then made his debut for the club on 8 March 2014 against Shonan Bellmare. He came on as a 78th-minute substitute for Hiroshi Azuma as V-Varen Nagasaki lost the match 3–0.