Isuna Hasekura (支倉 凍砂, Hasekura Isuna, born December 27, 1982) is a Japanese novelist and light novel author from Chiba Prefecture. Member of the Mystery Writers of Japan Association. He is the author of the light novel Spice and Wolf (Ōkami to Kōshinryō), with illustrations by Jyu Ayakura, which has been adapted into manga and anime.