Rockman was released in September 1995 in the Japanese arcades. It was known there as the 32th video game made for this system.
The game is known outside Japan as "Mega Man - The Power Battle". Here are some known export releases:
"Mega Man - The Power Battle [B-Board 91634B-2]
"Mega Man - The Power Battle [B-Board 91635B-2]
It was re-released on the new Capcom system (CPS-2) the same year as "Rockman - The Power Battle [Green Board]
Sony Records released a limited-edition soundtrack album for this game (Rockman - The Power Battle : Arcade Gametrack - SRCL-3451) on December 1, 1995.