Hatsumi is a Japanese given name that means "first month." It is of uncertain origin, but it is believed to have been derived from an ancient Japanese calendar system where each month had its own unique name. In Japan, Hatsumi is typically used as a female given name, although it can also be used for males. It is not widely known outside of Japan and may not have direct translations in other languages.
"Hatsumi had a notable presence in the early 20th century with consistent birth numbers between 1917 and 1925, peaking at 11 births each in 1918 and 1920. After a gap of nearly nine decades, there was another birth recorded in 2014."