Ikutsuhikone no mikoto, written as 活津日子命 (in Kojiki: The Records of Ancient Matters) or 活津彦根命 (in Nihonshoki: Chronicles of Japan), is the fourth son in five sons and three daughters given birth from the pledge made by Amaterasu (the Sun Goddess) and Susano (Amaterasu's brother: a deity in Japanese Mythology), and he was born from a bead which Amaterasu was wearing on her left wrist.
活津日子命（古事記）あるいは活津彦根命（日本書紀）とは、アマテラスとスサノオの誓約によって生まれた5男3女の四男で、アマテラスが左手に巻いていた玉から生まれた神。