Yamaguchi Prefecture


November 28, 2021

Yamaguchi Prefecture (Yamaguchi Prefecture) is a prefecture located in the Chugoku region of Japan.


It is located in the westernmost part of Honshu. Most of the prefecture's land is included in the Sanyo region, and the Kitaura district in the northern part of the prefecture is said to be the western end of the San'in region. The prefectural office is located in Yamaguchi City in the central part of the prefecture, but the centripetal power as a city is low, and the western part of the prefecture, including Shimonoseki City, which is the largest city in the prefecture, has close ties to Fukuoka Prefecture, and the eastern part of the prefecture such as Iwakuni City is Hiroshima. The connection with the prefecture is close (details will be described later). Since it corresponds to the Nagato and Suo provinces of the provinces of Japan, it has another name, Bouchiyo. Suo and Nagato were later ruled by Mr. Mori, and in the Edo period, they were also called the Choshu clan, so they are called Choshu. At the end of the Tokugawa shogunate, he became the center of the defeat movement and became the driving force behind the Meiji Restoration along with the Satsuma Domain. Fugu, which is designated as a fish in Yamaguchi Prefecture, has the largest market handling volume in Japan at the Haedomari market in Shimonoseki. In the local area and the surrounding area, it is called "Fugu" mainly by the dealers (Fugu leads to "unfavorable" and Fugu leads to "Fuku". See Shimonoseki and Fuku. ). Besides blowfish, there are abundant resources of marine products such as angler fish. Yamaguchi Prefecture is in a position where Intelsat can communicate in both directions to Europe via the Indian Ocean and to the United States via the Pacific Ocean, and the KDDI Yamaguchi Satellite Communication Center is located in Yamaguchi City. The center provides services for Intelsat Inmarsat, but SKY Perfect JSAT also has a ground station for his SUPERBIRD (Yamaguchi Network Control Center) and a ground station for the Local Authorities Satellite Communications Organization (Yamaguchi Control Bureau). For the latter, we are operating the most important missions such as the National Instant Alert System.

Topography / Region


Surrounded by the Seto Inland Sea (Hiroshima Bay, Iyo-nada, Suo-nada) on the south side, the Sea of ​​Japan (Hibiki-nada) on the west and north sides, and the sea on three sides, the Chugoku Mountains cross the central part. Rivers that originate in the Chugoku Mountains include the Saba and Ose rivers of the first-class water system, the Nishiki river, the Fushino river, the Koto river, the Kiya river, and the Abu river of the second-class water system. The plain is small, and there are many valley bottom plains surrounded by mountains except for a part of the inner part of Setouchi (the estuary of major rivers and the Shunan area).


Due to the geographical conditions of facing both the open sea and the inland sea and the mountains lying in the center, there are significant differences in climate even within the same prefecture. The climate is characterized by being roughly divided into "Seto Inland Sea coastal area", "Inland mountainous area", and "Sea of ​​Japan coastal area". Therefore, there are relatively few wind and flood damages and earthquakes. However, during the rainy season, as in Hiroshima prefecture, heavy rains are likely to occur due to the influence of the rainy season front and warm and humid currents, and the number of places where there is a risk of collapse of steep slopes is second only to Hiroshima prefecture in all prefectures. Sediment disasters are likely to occur due to soil, and even in recent years, there are areas that have been damaged by the heavy rains in northern China and Kyushu in July 2009 and the heavy rains in Shimane and Yamaguchi prefectures on July 28, 2013. In this way, there may be differences in the weather trends of each region even within the same prefecture, and the primary subdivision areas when announcing the weather forecast are set to four, "western", "central", "eastern", and "northern". (Originally, it was divided into three categories, "eastern", "western", and "northern", but the central part was divided from the former eastern part). On March 3, 2003, the area for warning and warning announcements related to weather was subdivided (secondary subdivision area was set up).

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