Abe joined Capcom in 1990, where he worked mainly on both CPS1 and CPS2 titles (using the alias Oyaji in his earlier works). The first (and most famous) of these is Street Fighter II, where he composed the main theme for the character Sagat (including its unique time signature) as well as the original "VS." and "Here Comes a New Challenger" jingles that would serve as templates for the company's future fighting games. This is emphasized most often by Abe himself, who always appears to handle those themes (or a different theme with an equivalent role) whenever he is involved with a game's soundtrack.