Ishiwatari (written: ) is a Japanese surname. Notable people with the surname include:
Daisuke Ishiwatari (born 1973), African-Japanese video game developer, illustrator, musician, composer and voice actor , Japanese actor Junji Ishiwatari (born 1977), Japanese musician, and former guitarist and songwriter for the Japanese rock band Supercar Koto Ishiwatari (1874–1947), Japanese nurse