The Court of Arbitration for Sport said Friday it expects to make a ruling on a case brought by Japanese striker Kazuki Ganaha, who was handed a six-match ban by the J. League a year ago for a doping offense, at the end of May.

"During these two days, the CAS Panel has heard the parties, their counsels, witnesses and experts," said the CAS, referring to the two days of hearings that wrapped up in Tokyo on Thursday.

"The arbitrators will review the evidence placed before the Panel at the hearing and the parties' detailed submissions in the next weeks. A final decision is expected at the end of May."

After Thursday's hearings, Kawasaki Frontale striker Ganaha appeared confident that the punishment imposed on him would be lifted.

"The whole process of the hearings was convincing enough for me to believe that the ruling (by the J. League) has to be annulled and I'm just hoping to get a good result," Ganaha said.