TOKYO (AP) – Club officials say former Japan defender Naoki Matsuda collapsed during training after a cardiac arrest.
Matsumoto Yamaga club officials say the 34-year-old Matsuda was unconscious on his arrival at a hospital.
Club president Hiroshi Otsuki quoted doctors as saying Maysuda's condition was ''extremely severe.''
Matsumoto Yamaga coach Yoshiyuki Kato says Matsuda collapsed after finishing a 15-minute warmup run during training.
Matsuda played 40 times for Japan, including at the 2002 World Cup in Japan and South Korea. He played a total of 385 J-League games for the Yokohama F Marinos from 1995 to 2010.