His first known work with Capcom was a single track for Mega Man X7, working through Value Wave along with five other composers. His first major title followed soon afterward with the third title in the Ace Attorney series. This would be followed by the spinoff series Ace Attorney Investigations (aka Gyakuten Kenji), working with Yasuko Yamada of Zuntata and Yasufumi Fukuda and Hiroshi Horiguchi of Twofive, though the second title failed to see an overseas release. Between these releases were a series of arrangement albums based on the games where Iwadare served as a major contributor.