Keizo Yamada was a 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. He retired on July 18, 2009. He was born in Odate, Akita.