is a city located in Chiba Prefecture, Japan. , the city had an estimated population of 95,266 in 43,191 households and a population density of 2800 persons per km<sup>2</sup>. The total area of the city is .
Located inland on the Shimosa Plateau in north-central part of Chiba Prefecture, Yotsukaidà  borders the prefectural capital of Chiba to the south and west. Kashima River in the Tone River system runs north to Lake Inba on the eastern edge of the city.
Chiba Prefecture
Yotsukaidà  has a humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Yotsukaidà  is 15.0 ðC. The average annual rainfall is 1431 mm with September as the wettest month. The temperatures are highest on average in August, at around 26.4 ðC, and lowest in January, at around 4.7 ðC.
Per Japanese census data, the population of Yotsukaidà  has grown rapidly over the past 60 years. Yotsukaidà  is home to almost 1,000 Afghans, which makes it the largest foreign population in Yotsukaidà  and the Japanese city with largest Afghan community.
Yotsukaidà  was inhabited by the Mononobe clan in ancient Japan, from whose name the Monoi region of the city is derived. In the Heian and Kamakura periods, it was under the control of shà Âen ruled by the Chiba clan for over 600 years. During the Edo period, portions were ruled by the Sakura Domain, and portions were tenryà  under the direct control of the Tokugawa shogunate . After the Meiji Restoration, the villages of Chiyoda and Asahi were founded on April 1, 1889 within Inba District, Chiba Prefecture with the creation of them modern municipalities system. However, much of the area of these villages was already under the control of the Imperial Japanese Army, which had established a field artillery training school in 1886. The artillery school remained an active military installation until 1945. Chiyoda was elevated to town status on December 23, 1940, and merged with Asahi Village on March 10, 1955 to form Yotsukaidà  Town. Yotsukaidà  was elevated to city status on April 1, 1981. Proposals to merge the city into neighboring Chiba were rejected by public referendum in 2003 and 2004.
Yotsukaidà  has a mayor-council form of government with a directly elected mayor and a unicameral city council of 20 members. Yotsukaidà  contributes two members to the Chiba Prefectural Assembly. In terms of national politics, the city is part of Chiba 9th district of the lower house of the Diet of Japan.
Yotsukaidà  is a regional commercial center and a bedroom community for nearby Chiba and Tokyo. The largest industry within the city borders is a large food processing facility operated by Yakult.
Public high schools:
Private high schools:
JR East â Sà Âbu Main Line