Kageyama Reiji (影山(かげやま) 零治(れいじ)), also known as Mister K (ミスターK), was the coach of Teikoku Gakuen, Zeus, Shin Teikoku Gakuen, Team K and Orpheus. When he was young, he was a member of the Inazuma Eleven. He is known to be the uncle of Kageyama Hikaru from the GO series. In the Galaxy series, he is known as Kuroiwa Ryuusei (黒岩(くろいわ) 流星(りゅうせい)), the coach for Inazuma Japan and Earth Eleven.