Matsunaga was born in Shida District, Shizuoka on December 6, 1921.
[1] After graduating from Tokyo Liberal Arts and Science University, he played for Nippon Light Metal.
In March 1954, Matsunaga was selected by the Japan national team for the 1954 World Cup qualification.
On September 25, 2007, Matsunaga died of lymphoma in Fujieda at the age of 85.
This biographical article related to a Japanese association football defender born in the 1920s is a stub.