In Japanese mythology, Ama-tsu-Mikaboshi (ja:天津甕星, "August Star of Heaven"), also called Ame-no-Kagaseo (ja:天香香背男, "Brilliant Male"), and later Ama-no-Minaka-nushi ("Divine Lord of the middle heavens") was originally a Shinto god of the Pole Star and the primordial chaos. Under Chinese Buddhist influence, the god was identified with "Myo-Ken" (Sudarshana), as either Venus or the pole star, before being combined with the god of all stars, Ama-no-Minaka-Nushi.
He is mentioned in passing in the Nihon Shoki as an opponent of Takemikazuchi-no-kami during the latter's conquest of the land of Izumo, and is sometimes identified with the figure of Takeminakata in the Kojiki.