Toshinari is a masculine Japanese given name. Notable people with the name include:
Toshinari Maeda, Japanese generalFujiwara Toshinari, better known as Fujiwara no Shunzei, poet and nobleman of ancient JapanFujiwara Toshinari no Musume, Shunzei's granddaughter and noted poetPrince Toshinari (b. 1844, d. 1872 CE), eighth son of Fushimi-no-miya Kuniye, who founded a branch of the Imperial Household of JapanToshinari Suwa, member of the men's marathon team for Japan in the 2004 Summer Olympics