South Korean defender Jang Hyun-soo has re-joined his old Japanese club FC Tokyo, the footballer's agency said Wednesday.

Inspokorea said Jang signed a two-and-a-half year deal with the J. League outfit after a medical test, and officially ended his spell with Chinese side Guangzhou R&F.

Jang made his pro debut with FC Tokyo in 2012 and scored four goals in 40 matches in two seasons before moving to Guangzhou. The 25-year-old had been a regular member with the Chinese Super League club, but lost his spot this year after the league implemented a new foreign player rule.

Previously, Chinese clubs were allowed to play three foreigners plus one Asian player. But now the Asian quota is gone, and that one spot in the lineup must be filled by a Chinese player under the age of 23.

"I was facing a difficult situation in China, and I want to thank FC Tokyo for helping me out," Jang said. "I will try my best for FC Tokyo to help the team win the championship."

In this file photo taken on March 28, 2017, South Korean defender Jang Hyun-soo (L) vies for the ball with Syria's Nasouh Al Nakdali during the 2018 FIFA World Cup Asian qualifer between South Korea and Syria at Seoul World Cup Stadium in Seoul. (Yonhap)