Ibaraki Prefecture is a prefecture of Japan located in the Kantō region on Honshū island. The capital is Mito. Ibaraki Prefecture was previously known as Hitachi Province. In 1871, the name of the province became Ibaraki. Ibaraki Prefecture is the northeastern part of the Kantō region, stretching between Tochigi Prefecture and the Pacific Ocean and bounded on the north and south by Fukushima Prefecture and Chiba Prefecture. It also has borders on the southwest with Gunma Prefecture and Saitama Prefecture. The northernmost part of the prefecture is mountainous, but most of the prefecture is a flat plain with many lakes. Ibaraki's industries include energy, particularly nuclear energy, production, as well as chemical and precision machining industries. The Hitachi company was founded in the Ibaraki city of the same name. Ibaraki's population is increasing modestly as the Greater Tokyo region spreads out. Famous foods of Ibaraki include natto, of Mito, the watermelons produced in Kyowa (recently merged into Chikusei), and the chestnuts grown in the Nishiibaraki region. Ibaraki is famous for the martial art of Aikido which was founded by Ueshiba Morihei, also known as Osensei. Ueshiba spent the latter part of his life in the town of Iwama, now part of Kasama, and the Aiki Shrine and dojo he created remain there to this day. There are castle ruins in many cities, including Mito, Kasama, and Yuki. Kasama is also famous for its Shinto and art culture, and pottery.