Koto-sanzan (the three temples in the east of Lake Biwa) collectively means three Tendai Sect temples, namely Saimei-ji Temple, Kongorin-ji Temple, and Hyakusai-ji Temple.
湖東三山（ことうさんざん）は、西明寺、金剛輪寺、百済寺の三つの天台宗寺院の総称。