His next work was on Gundam Wing, where most of the enemy mobile suits, including the popular Tallgeese, were designed by him.
Katoki also has worked in Super Robot Wars and Virtual On video games, and in the Patlabor 2 movie.
He also collaborates quite frequently with Bandai, often doing touch-up designs for the Master Grade model kits and production of the Gundam fix figuration (G.F.F.)
One of the reasons that I fell in love with Gundam was that it excites me to imagine what it would be like if these machines actually existed, and I worry that other fans may be losing out..." He said he hopes his work will catch peoples' attention"...then people who had never before been drawn in by the magic of these giant robots may discover their attraction for the first time."
He was also involved in the color scheme design of Toyota Team Kraft's SC430 (#35, GT500) which participated in Super GT seasons in 2006 and 2007.