Oarai Town is situated in the east of Ibaraki. The seashores facing the Pacific Ocean, Lake Hinuma located on the west side of the town, and areas along the Hinuma River form popular resort areas, belonging to Oarai Prefectural Seaside Park. The white-crested waves breaking against the conglomerate rocks on Oarai Promontory are very dynamic, from which the sandy beach stretches southward. This beach is as one of the pleasantest sea resort in Kanto Region.