Kozo Masuda (?? ??, Masuda Kozo, March 21, 1918 – April 5, 1991) is a deceased Japanese professional shogi player who achieved the rank of 9-dan.
He is a former Meijin who was known for playing very creative shogi.
For instance, top player Yoshiharu Habu considered Masuda's playing style to be 30 years ahead of its time and the origin of the modern way to play shogi.