Niigata is a port city on Honshu, Japan’s main island. The Minatopia history museum complex includes heritage buildings like the 19th-century Niigata Customs House. Along the seacoast, the Marinepia Nihonkai aquarium has sea otters and dolphins. Part of the Northern Culture Museum, the Ito Estate was home to a wealthy 1800s family and displays their art collection. South are the hot springs of Iwamuro.