Ugajin was born in Toda on March 23, 1988. After graduating from Ryutsu Keizai University, he joined J1 League club Urawa Reds in 2010. He played many matches as left side back from first season. Urawa won the 2nd place in the 2014 and 2016 J1 League. In 2017, Urawa won the champions the 2017 AFC Champions League. Urawa also won the 2nd place in the 2019 AFC Champions League.