Bōsō Peninsula

The Bōsō Peninsula (Bōsō-hantō) is a peninsula that encompasses the entirety of Chiba Prefecture on Honshu, the largest island of Japan. It is part of the Greater Tokyo Area. It forms the eastern edge of Tokyo Bay, separating it from the Pacific Ocean. The peninsula covers approximately 5,034 square kilometres (1, 944 mi2).

Data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).