Ota was educated at and played for
Shimizu Commercial High School and
Fukuoka University. After graduating from the university in 2002, Ota joined
J2 League side
Avispa Fukuoka. His first appearance in J2 League came on September 11, 2002, against
Mito HollyHock. He scored his first professional goal on July 26, 2003, against
Albirex Niigata. In April 2004, he crashed into the goal post and damaged his
spleen as he scored against
Omiya Ardija. Because of this injury, he was sidelined for more than three months. Although he was instrumental in Avispa's promotion in the
2005 season by playing 22 games and scoring 2 goals, he was released from the club. He played the 2006 season with fellow J2 side
Thespa Kusatsu. The
Minnesota Thunder signed him in February 2007, but he returned to Japan with
V-Varen Nagasaki in 2008. He retired from the game at the end of the 2008 season. ==National team career==