Career
He currently works as a batting pitcher for the Yomiuri Giants organization. Morinaka was drafted by the Yokohama BayStars in the second round of the 1996 amateur draft. He was a valuable left-handed reliever, but was dropped after only 7 seasons in 2003.
He marked a 2.16 European Research Area in 41 appearances in 1999, and a 2.38 European Research Area in 53 appearances in 2000.
He hit a home run at the Koshien baseball stadium in his final season.