Yasuhisa Watanabe (Dec. 30, 1968), who also goes by the alias “Yack”, is a videogame musician, perhaps most well known for his work as a member of Zuntata. He has contributed to games such as Street Fighter EX 3, Border Down, Senko no Ronde, and Elevator Action Returns. Watanabe is no stranger to employing jazz and/or jazz-fusion elements, including fractured melodies, dramatic shifts in key, complex chords, and irregular rhythms. Kind of a weirdo, even among videogame composers. Similar to many other Japanese composers, he's in the sad position of the industry having grown beyond his specialty, and thusly composes for doujin or eroge titles.