Career
Club
Nishikawa is a product of Oita"s youth system and was promoted to the top team in 2005. Nishikawa made his J-League debut on 2 July 2005 in a match against Yokohama F. Marinos. He became a regular in the 2006 season.
After the relegation of Oita Trinita signed on 30 December 2009 for J-League club Sanfrecce Hiroshima.
International
He made his full international debut for Japan on 8 October 2009 in a 2011 AFC Asian Cup qualifier against Hong Kong.