After graduating from high school in 1995, Toyoyama joined Osaka University of Health and Sport Sciences' rugby club, with which he played in the All-Japan University Rugby Championship.
In 1999, he graduated from university and joined Toyota Motors club.
He was also present in the 2003 Rugby World Cup squad coached by Shogo Mukai, playing three pool stage matches in the tournament.
[2] In 2008, Toyoyama left Toyota Verblitz, retiring as player.
[3] In 2013, he was appointed as coach by his former club, Toyota Verblitz and served for two seasons.