Toyo (臺與; c. 235 - year of death unknown), also written as 壹與, was a woman who was said to have succeeded Himiko as her relative in the 3rd century of the Yayoi period (c. 250 BC – c. 250 AD; Yayoi derives from the name of district in Tokyo where the pottery representing this period unearthed) in Japan; Himiko was a queen of Yamataikoku (the largest chiefdom in Japan c. 250 governed by a female shaman named Himiko), who was in Gishiwajinden (Worenchuan [account of the Wa people] section of the volume Records of Wei [history of Cao Wei Kingdom; 220 - 265 in China]) in "Sanguo Zhi (a history book)" (Records of the Three Kingdoms; a historical record on the Three Kingdoms of Wei, Shu and Wu in ancient China).
臺與（とよ、235年頃？－没年不詳）は日本の弥生時代3世紀に『三国志(歴史書)』、魏志倭人伝中の邪馬壹国の女王卑弥呼の親族にして、卑弥呼の跡を継いだとされる女性・壹與のことである。