Following the success of "Tetris" for the Game Boy, Square president Masafumi Miyamoto wanted to make their own version of it, but the staff instead designed an RPG, the first for the platform; Kawazu acted as director and designer. The game was "Makai Toushi SaGa", released in the West as "The Final Fantasy Legend". It proved hugely popular and was Square's first title to sell a million copies. Kawazu subsequently worked on "Final Fantasy Legend II", then upon request from Nintendo started production on "Romancing SaGa" for the Super Famicom; another production team in Osaka designed a third Game Boy title without his involvement. He would continue working on "SaGa" titles for the Super Famicom, and multiple PlayStation titles for the next several years.