is a city located in the western portion of Tokyo, Japan. , the city had an estimated population of 131,895 in 63,917 households, and a population density of 1300 persons per km2. The total area of the city is . Geography Ōme is located in the Okutama Mountains of western Tokyo, bordered by Saitama Prefecture to the north. The Tama River runs from west to east almost in the center of the city area, and the Kasumi River and Naruki River, which are tributaries of the Iruma River (Arakawa River system), also flow from west to east in the north. The geography changes from the flat land in the east to the hills and mountains in the west. The highest point is 1,084 meters on Mount Nabewariyama on the right bank of the Tama River in the western end of the city. Surrounding municipalities Tokyo Metropolis Hinode to the south Hamura to the southeast Okutama to the west Akiruno to the south Saitama Prefecture Hanno to the north Iruma to the east Climate Ōme has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Ōme is 12.3 °C. The average annual rainfall is 1998 mm with September as the wettest month. The temperatures are highest on average in August, at around 23.8 °C, and lowest in January, at around 0.7 °C. Demographics Per Japanese census data, the population of Ōme increased rapidly in the 1970s and 1980s. History The area of present-day Ōme was part of ancient Musashi Province. Ōme developed in the Edo period as a post station on the Ōme Kaidō highway. In the post-Meiji Restoration cadastral reform of July 22, 1878, the area became part of Nishitama District in Kanagawa Prefecture. The town of Ōme was created on April 1, 1889, with the establishment of modern municipalities system. Nishitama District was transferred to the administrative control of Tokyo Metropolis on April 1, 1893. Ōme was elevated to city status on April 1, 1951, by merging with the neighboring villages of Kasumi and Chōfu. Later in 1955, four additional villages (Yoshida, Mita, Kosoki, and Nariki) merged with Ōme. Government Ōme has a mayor-council form of government with a directly elected mayor and a unicameral city council of 24 members. Ōme contributes one member to the Tokyo Metropolitan Assembly. In terms of national politics, the