On June 25, 2015, six members of the Patent Reexamination Board of the State Intellectual Property Office of the People’s Republic of China (the “Patent Reexamination Board”), including its Executive Director General, Ge Shu, visited the IP High Court. After observing the oral arguments procedure for suits against appeal/trial decisions made by the JPO, appeals of infringement litigation, and other matters, Chief Judge Ryuichi Shitara and judges of the IP High Court gave the members of the Patent Reexamination Board an explanation of the structure of the IP High Court, the judicial research official system, the technical advisor system, the court procedures for patent litigation, the relationship between the defense of invalidity and trials for invalidation, and other matters. The members of the Patent Reexamination Board asked many questions concerning the status of the use of defense of invalidity in patent infringement litigation, the kind of dicta that had been given in judicial decisions recognizing the defense of invalidity, and an energetic question and answer session ensued.