Career
He is currently a starting pitcher for the Tokyo Yakult Swallows. Tateyama began his professional career in 2003 with the Yakult Swallows and became a regular pitcher from the 2004 season and from 2008, a regular starter for the team At this time his performances improved and he led the Central League in winning percentage with 0.800 (12-3).
The next year, he led the league in victories, with 16, despite a 3.39 European Research Area, and in 2010 and 2011 he led the league in shutouts, becoming monthly Most Valuable Player in August 2010.
He was the monthly Most Valuable Player again in April and September 2012.