Hiroyuki was born on October 30, 1957 in Tokyo, Japan. He first got into video games when he was very young, and got interested in the industry when he first saw Space Invaders. At the age of 30 he saw a want ad in a newspaper for a company called Enix. He got the job and helped with promotional work on Dragon Quest III. Later he worked on Dragon Quest IV as an assistant producer. After that he created his own company called Climax where he helped create Shining in the Darkness.