Masatoshi is a masculine given name of Japanese origin, composed of two kanji characters: 'Masao' (正) meaning 'just', and 'Toshi' (年) meaning 'year'. Together, they signify 'truth' or 'sincerity' in an annual context. The name was popular among the nobility during Japan's Heian period but has since become more common among the general population. It is often shortened to Masao or Toshi in daily use.
Masatoshi was quite popular in those years, with more babies named Masatoshi born in 1918 than in the following year. Altogether, there were 16 boys named Masatoshi during these two years.