Matsumoto is a partner of Dr. Asano and Gorota.
After Gorota went missing way off in cyberspace (VG), on 16 November Matsumoto wrote in Sorceror BBS that Asano was responsible, and should get out looking for him, or Matsumoto will tell the Turings about his "pet project". Turing happened to glance over his message and required to hear about it.