Keizo Yamada (?? ??, Yamada Keizo, born January 30, 1927) is a retired long-distance runner from Japan, who won the 1956 edition of the Fukuoka Marathon, clocking 2:25:15 on December 9, 1956.
He represented his native country at the 1952 Summer Olympics, finishing in 26th place (2:38:11) and won the 1953 Boston Marathon.