Masaichi
# Masaichi

Masaichi (written: 雅一, 正一, 政一 or 政市) is a masculine Japanese given name. Notable people with the name include:

* Fukushi Masaichi (福士 政一, 1878–1956), Japanese physician and pathologist
* Masaichi Kaneda (金田 正一, 1933–2019), Japanese baseball player
* Masaichi Kondō (近藤 政市, born 1917), Japanese World War II flying ace
* Masaichi Nagata (永田 雅一, 1906–1985), Japanese film producer and baseball executive
* Masaichi Niimi (新見 政一, 1887–1993), Imperial Japanese Navy admiral
