Fukushi Masaichi (?? ??, 30 January 1878 – 3 June 1956) was a Japanese physician, pathologist and Emeritus Professor of Nippon Medical School in Tokyo.
He was the founder of the world's only collection of tattoos taken from the dead.
Fukushi Masaichi and his son Fukushi Katsunari are known in Japan as "Irezumi Hakase" (????, approximately: "Dr.