Dong Woon was a trainee from JYP Entertainment for two years, and was the last member chosen to join Beast.

Dong Woon attended Hanyoung High School and graduated from Dongguk University on 16 February 2017.

In December 2010, Son released a digital single album Udon together with Davichi's Kang Min Kyung.

[7] On May 22, 2015, Cube Entertainment revealed that Son will release his first solo album Kimishika on July 1 before officially beginning his Japanese debut promotions.

[8] On February 2, 2017, Son released Universe, a digital single album in collaboration with composer Yoo Jae-hwan.