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22-618: Shiraoka is located slightly south of the center of the Kanto Plain in the flatlands eastern Saitama Prefecture and has an almost flat terrain. The highest point in the city is 16 meters above sea level. The Motoara River runs along the city border with Hasuda. Shiraoka is approximately 40 kilometers from downtown Tokyo., Shiraoka has a humid subtropical climate (Köppen Cfa ) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Shiraoka

44-601: Is 14.7 °C. The average annual rainfall is 1352 mm with September as the wettest month. The temperatures are highest on average in August, at around 26.7 °C, and lowest in January, at around 3.77 °C. Per Japanese census data, the population of Shiraoka has increased from the 1980s. The villages of Shinozu and Oyama were created within Minamisaitama District, Saitama with the establishment of

66-643: Is a 173-kilometre (107 mi) long river that flows through Saitama Prefecture and Tokyo . Its average flow in 2002 was 30 m /s. It originates on Mount Kobushi in Saitama Prefecture , and empties into Tokyo Bay . It has a total catchment area of 2,940 km (1,140 sq mi). The river is one of Tokyo's major sources of tap water , and together with the Tone River , accounts for around 80% of Tokyo's water supply as of 2018. The Okubo water purification plant takes water from

88-717: Is defined by the Bōsō Peninsula , the Miura Hills , Tokyo Bay , and Sagami Bay . The Kashima Sea and Kujūkuri Beach define the eastern end of the plain. Most of its rivers originate in the northern or western mountain ranges and flow east or southeast into the Pacific Ocean , Tokyo Bay , or Sagami Bay . In the central part of the plain is the Tone River ; in the northern part the Watarase River , Kinu River , Kokai River, Naka River , and Kuji River ; and in

110-459: Is recorded several times during the winter. Throughout the year, the entire Kanto Plain, especially the inland areas, are easily affected by radiative cooling due to clear skies and north winds, so the minimum temperature before sunrise can drop to about 5 degrees below zero in winter. Even on days when the temperature drops at dawn, the daytime temperature rises to about 7 to 10 degrees Celsius on sunny days, and on days with strong dry north winds,

132-525: The Kanto Plain is temperate, with a Pacific Ocean side climate. Winters are cold and summers are hot. The further inland, the greater the temperature difference between summer and winter, and within a day. There are relatively many hours of sunshine, especially in the northern part. Due to the influence of the Black Current (warm current) flowing along the coast, the climate is mild, especially in

154-616: The Saitama Prefectural Assembly. In terms of national politics, the city is part of Saitama 13th district of the lower house of the Diet of Japan . Shiraoka remains primarily an agricultural community; however due to its location, it is increasingly becoming a bedroom community for neighboring Saitama City and the Tokyo metropolis. Shiraoka has six public elementary schools and four public middle schools operated by

176-587: The Sayama Hills and Tama Hills , typically, undulating between 100 and 200 m above sea level. Hills located at the western edge of the Kantō Plain, the Hiki Hills, Koma Hills, Kusahana Hills, and Kaji Hills, also reach approximately 200 m (660 ft) above sea level. The overall tilt of the plateaus and hills is noteworthy. In general, the whole area is slightly bent and forming a basin centered in

198-589: The Tone River and Tokyo Bay. The ongoing process of tectonic extension continues as the plain's central region gradually sinks. The Kantō Plain witnessed its greatest devastation from an earthquake on 1 September 1923 , with a death toll calculated of 142,807. Kanto Plain was formed by the Kanto basin-forming movement, which has continued since the Neogene period . This movement is what caused sedimentation in

220-599: The center of the present-day Kanto Plain and uplift of the surrounding mountains. As a result, sediment from the surrounding mountains was deposited very thickly (the Tertiary layer reaches as high as 3,000 meters) and further uplifted to form many hills and plateaus. Large tectonic lines such as the eastern margin of the Fossa Magna and the Median Tectonic Line are thought to exist in the central part of

242-646: The city government, and one public high school operated by the Saitama Prefectural Board of Education. [REDACTED] JR East – Utsunomiya Line Kanto Plain 36°00′N 140°00′E  /  36.000°N 140.000°E  / 36.000; 140.000 The Kantō Plain ( Japanese : 関東平野 , Hepburn : Kantō heiya ) , in the Kantō region of central Honshu , is the largest plain in Japan . Its 17,000 km covers more than half of

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264-814: The cool air brought in by the Yamase, resulting in a cold summer. In winter, the monsoon from the Sea of Japan is blocked by the Mikuni Mountains, and the moisture falls as snow along the mountains to the north, and the monsoon that has lost its moisture blows through the Kanto Plain as a strong gale carrying dry air (such as Akagi Orosi in Gunma Prefecture , Tsukuba Orosi in Ibaraki Prefecuture and Futaara Orosi). Snowfall has been decreasing year by year, but snow accumulation of around 10–20 cm

286-518: The eastern United States. This means that officials and volunteers from both river areas collaborate with each other. This river is also depicted in many anime such as Toaru Kagaku no Railgun and Arakawa Under the Bridge , which is set on the riverbank. The Arakawa plays a small but significant background role in the game Yakuza 4 . Main character Masayoshi Tanimura spends the game trying to discover who murdered his father, Taigi, whose body

308-448: The modern municipalities system on April 1, 1889. On September 1, 1965, Shinozu and the neighboring village of Hikachi, together with a part of Oyama merged to form the town of Shiraoka. Shiraoka was elevated to city status on October 1, 2012. Shiraoka has a mayor-council form of government with a directly elected mayor and a unicameral city council of 18 members. Shiraoka, together with the town of Miyashiro , contributes one member to

330-494: The plain, but this thick accumulation of soft sedimentary layers makes it difficult to find active faults that can cause earthquakes (faults exist in the base 3000m below the sedimentary layers). In addition, natural sediments such as sediment carried by rivers have been used to create land, and the terrain was almost the same as it is today in the Late Jomon to Early Yayoi Period (more than 3,000 years ago). The climate of

352-548: The plateaus, the Musashino Plateau has the largest stretch of land, extending from the western edge of Ōme to the eastern edge of Yamanote , which borders the alluvial plains of the Arakawa and Sumida Rivers. Its elevation gradually declines from west to east, measuring 190 m at Ōme and 20 m at Yamanote. Hills in the Kantō Plain stand on Tertiary strata and rise higher than surrounding plateaus, exemplified by

374-660: The region extending over Tokyo , Saitama Prefecture , Kanagawa Prefecture , Chiba Prefecture , Gunma Prefecture , Tochigi Prefecture , and Ibaraki Prefecture . The northern limit borders on the Abukuma Highlands , Yamizo Mountain Range , Ashio Mountain Range, and a volcanic field associated with the Nasu Volcanic Belt. The western coincides with the Kantō Mountain Range , and the southern edge

396-594: The river. Attempts to control flooding of the Arakawa River have been made since the area that is now Tokyo became the de facto capital of Japan during the Edo period . Following a major flood in 1910 that damaged a large part of central Tokyo, a 22-kilometre (14 mi) long drainage canal was constructed between 1911 and 1924. In 1996 an agreement was signed to make it a "sister river" of the Potomac River in

418-603: The sensory temperature is lower than the actual temperature. The lowest temperatures in central Tokyo are higher than those in surrounding areas due to the heat island effect. Kumagaya tends to get hotter because of being inland, foehn phenomenon, which occurs when the wind in the sky above blows down after crossing the mountains on the north and west sides of the Kanto Plain, and the sea breeze that warms up while passing through central Tokyo. Arakawa River (Kant%C5%8D) The Arakawa River or Ara River ( Japanese : 荒川 , Hepburn : Arakawa , "kawa" (川) already means "river")

440-518: The southern part the Arakawa River , Tama River , and Sagami River . Of these, the Tone River encompasses a large area of floodplain, for its drainage area of 16,840 km (6,500 sq mi) is the largest in Japan. The drainage areas covered by these rivers account for the alluvial lowland of the Kantō Plain. A collection of plateaus constitute a large part of the plain. Among them are

462-439: The southern part. In summer, rainfall is heavy due to the rainy season front caused by monsoon, and typhoons are often seen. Thunderclouds that form in the northern to western mountains areas before noon reach the plains in the early afternoon, often resulting in evening showers (thunderstorms). In years when Okhotsk anticyclone prevails, the winds from this anticyclone become northeasterly winds, and temperatures do not rise due to

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484-465: The Ōmiya, Musashino , Sagamino , Jōsō , and Shimōsa Plateaus. These large plateaus are divided into smaller ones by shallow river valleys. A common feature of the plateaus is that their surfaces are covered with a thick layer of loam of volcanic origin. Volcanic ash from surrounding volcanoes, Mounts Asama , Haruna , and Akagi to the north and Mounts Hakone and Fuji to the southwest, are thought to have been deposited on these plateaus. Among

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