Lake TegaLake Tega is a lake located in the Chiba Prefecture of Japan, northeast of Tokyo.WWW Official SiteGeographyLocationLake Tega is located entirely in the northwest of Chiba Prefecture, on the main island of Japan: Honshū. As the crow flies, it is about north of Tokyo Bay, and north East of Tokyo Metropolitan Area.TopographyLake Tega has a total area of for a perimeter of. Its average depth is and its maximum depth of. It has the distinction of being composed of two bodies of water: Lake Tega and Lake Shimotega, a watercourse of the watershed of the Tone River.