Niigata Prefecture (新潟県 Niigata-ken) is a prefecture of East Japan located on the island of Honshu on the coast of the Sea of Japan. The capital is the city of Niigata with which it shares the same name. It makes up part of the Chubu Province.
Niigata Prefecture stretches about 240 km along the Sea of Japan, from the southwest to the northeast, with a coastal plain between the mountains and the sea. It also includes Sado Island. Niigata Prefecture could be placed in either the Hokuriku or the Kōshinetsu, both of which are considered parts of the Chūbu region. The prefecture is generally divided into four geographical areas: Jōetsu region (上越) in the south, Chūetsu (中越) in the center, Kaetsu (下越) in the north, and Sado Island. The mouth of the Shinano River, the longest river in Japan, is located in Niigata Prefecture.
As of April 1st 2014, 25% of the total land area of the prefecture was designated as Natural Parks, namely Bandai-Asahi, Chūbu-Sangaku, Nikkō, and Oze National Parks; Echigo Sanzan-Tadami and Sado-Yahiko-Yoneyama Quasi-National Parks; and thirteen Prefectural Natural Parks.