 On February 13, 2005, Shimonoseki absorbed the towns of Hōhoku, Kikugawa, Toyota and Toyoura (all from Toyoura District) to create the new and expanded city of Shimonseki.Since October 1, 2005, the city has been designated as a core city by the Japanese Government.The geographical position of Shimonoseki has given it historical importance, especially with the Bombardment of Shimonoseki in 1864 and the Treaty of Shimonoseki, where a defeated China handed over Taiwan, Penghu, and Port Arthur to the victorious Japanese in 1895.