Ioe no Iratsume (五百 重娘, ?–?) was a daughter of Fujiwara no Kamatari and younger sister of Fujiwara no Fuhito and Hikami no Ōtoji, wife of Emperor Tenmu. She was first married to Emperor Temmu, but after his death she got remarried to her half-brother Fuhito, with whom she had a son Fujiwara no Maro. She was also known as Ōhara no Ōtoji (大原大刀自, "big field big sword").