 He captured the J.League Rookie of the Year Award for the 2004 season.On 23 July 2006, Tokyo Verdy announced a one-year loan deal sending Morimoto to Catania of Serie A.

Morimoto made his Serie A debut on 28 January 2007 during an away game against Atalanta.He entered the game at the 83rd minute and scored the equalising goal, his first, just five minutes later.