Kawasaki Frontale's club doctor filed Monday with the Japan Sports Arbitration Agency seeking nullification of the J. League's punishment of striker Kazuki Ganaha, who received an intravenous injection from the doctor after a practice session in April. In May, the J. League imposed a six-match ban on Ganaha and fined Kawasaki ¥10 million, saying it violated the league's anti-doping code. The J. League's agreement is needed for the JSAA to start the arbitration process. "We'll read Kawasaki's request for arbitration thoroughly and listen to those familiar with this kind of issue," J. League Chairman Kenji Onitake said. "But I don't think our stance will change." The JSAA, established in 2003, has never handled a case involving a professional sport, soccer or doping. "We believe the J. League will come to the table," said the club doctor's representative. In August, the Japan Anti-Doping Agency ruled that a case involving Ganaha did not violate the World Anti-Doping Agency's code.