Onjuku (Japanese: 御宿町) is a coastal town in Isumi District on the southeastern part of Chiba Prefecture, Japan. It covers 25 sq km (10 sq mi) and has a population of around 7,700 people (2012 estimate).
The history of the Onjuku area can be traced to a poem by Hojo Tokiyori in the 13th century. At that time, it was part of Kazusa Province. In 1609, a Spanish galleon ran aground near here. The survivors were cared for by the town and was later given safe passage by the Tokugawa shogunate to return to Mexico.
The present city of Onjuku was established as a village in 1889. It grew into a town in 1914. Today its economy depends on tourism and commercial fishing. On the beach is a local landmark called Tsuki no Sabaku, or "desert of the moon". Built it 1969, it depicts a prince and princess on camels.
Beach in Onjuku with the Tsuki no Sabaku statue in Chiba Prefecture, Japan