In 2013, Kajiyama was loaned to Super League Greece club Panathinaikos. In July, he returned to FC Tokyo. In August, he was loaned to Oita Trinita. Although he played many matches, Trinita finished at the bottom place in 2013 season. In 2014, he returned to FC Tokyo. However his opportunity to play decreased year by year and he could hardly play in the match in 2018. In July 2018, he moved to J2 League club Albirex Niigata. He retired end of the 2018 season.