Authorities believe a  5 foot high island on Japan’s Northern coast has been washed away to sea.

The Esambe Hanakita Kojima island was officially surveyed and registered by Japan’s coastguard in 1987, who could not measure its correct size. Until recently it was less than 140cm above sea level, visible from the Northern tip of Japan’s Hokkaido island. However authorities now fear the Japanese island has disappeared, shrinking the country’s territorial waters.