Tateishi is also one of the sound team members who engaged in a sort of "secret deal" made possible by close workspace arrangements. During a slump in Mega Man 2 composition, Manami Matsumae contributed eight bars to Air Man's stage theme because her workspace was next to Tateishi's. Tateishi would later return the favor by composing the Forest Stronghold theme, a fan favorite, for U.N. Squadron. Yoshihiro Sakaguchi, who acted as their manager, was aware of these and other instances from other sound members.