The Tokyo Family Court has ruled in favor of actor and former pop idol Mikio Osawa, who had denied any biological connection with the son he allegedly fathered with actress and ex-wife Mai Kitajima.

The case went to court last month after Osawa, former leader of the all-boy idol group Hikaru Genji, conducted a DNA test in 2013 to prove he is not the son's biological father — a claim Kitajima, 43, objected to.

The decision, handed down Thursday, ended the former couple's dispute, noting that "under the law, there is no biological relationship" between Osawa, 46, and the son, who is now 18. The son's name is being withheld as he is a minor.