Tatsuya Furukawa (usually good-cool, occasionally Delaware) is a Bemani producer, specializing in house and rock music. He is one of the few Bemani producers to have composed songs for all three lines of Beatmania games, and he also produces songs for Pop'n Music. "School" is the pseudonym used for his rock songs sung by Bemani vocalist Hideo Suwa. In 2005, good-cool released his first album "ultra expander".