Masaichi is a unisex given name of Japanese origin, derived from two components: 'masa' meaning 'wide, spacious', and 'ichi' meaning 'one'. It's often used as a boys' name but can also be found among girls. The name Masaichi is not particularly common in Japan but has been used throughout history, with some notable bearers including manga artist Masaichi Yamanobe and musician Masaichi Kageura.
Masaichi is a name that experienced fluctuations in popularity between 1912 and 1933, with the years 1918 and 1924 seeing the highest number of births (21 and 14 respectively). The total number of births over this period was 159.