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Nishikawa began his senior career with Sanfrecce Hiroshima, a Japanese professional football club based in Hiroshima. He joined the club's youth academy in 2002 and made his senior debut in 2005. Nishikawa quickly established himself as a regular starter for Hiroshima, helping the club win the J1 League title in 2012 and 2013. He also represented Japan at the international level, earning over 30 caps for the national team.