is a former Japanese footballer who last played as a striker for Tegevajaro Miyazaki.
After spending close to six years with Honda Lock S.C. in the Japan Football League Mizunaga signed for fellow Japan Football League side V-Varen Nagasaki for the 2011 season.
Mizunaga began the 2013 in the J. League Division 2 with V-Varen Nagasaki after the club gained promotion to the league. Mizunaga made his full-professional debut in the 2nd Division on 3 March 2013 against Fagiano Okayama in which he came on as a 75th-minute substitute for Kà Âichi Satà  as VâÂÂVaren drew the match 1âÂÂ1. Mizunaga then scored his first ever goal in the J. League Division 2 the very next game against former Japanese champions Gamba Osaka in which was also VâÂÂVaren's first home game in the 2nd Division in front of over 18,000 fans in attendance in which he scored in the 79th minute for the club which turned out to be a consolation as VâÂÂVaren Nagasaki lost the match 3âÂÂ1. He then scored his second goal of the season on 24 March 2013 against Matsumoto Yamaga before scoring his third goal the very next game on 31 March 2013 against Gainare Tottori in which VâÂÂVaren Nagasaki won 3âÂÂ1.
After a long journey through different clubs in J. League, Mizunaga came back home and joined newly promoted JFL-team Tegevajaro Miyazaki in December 2017. In 2022, having lastly played for them, he announced his retirement.
Updated to 8 March 2020.