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Title: Isumi  
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Subject: Chiba Prefecture, Cities in Chiba Prefecture, Sotobō Line, Chiba, Sanbu District
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Ohara Station in Isumi City
Ohara Station in Isumi City
Flag of Isumi
Official seal of Isumi
Location of Isumi in Chiba Prefecture
Location of Isumi in Chiba Prefecture
Isumi is located in Japan
Country Japan
Region Kantō
Prefecture Chiba Prefecture
 • Mayor Hiroshi Ōta (2005-present)[1]
 • Total 157.50 km2 (60.81 sq mi)
Population (April 1, 2012)
 • Total 40,185
 • Density 255/km2 (660/sq mi)
Time zone Japan Standard Time (UTC+9)
Address 7400 Ōhara, Isumi-shi, Chiba-ken
Website .jp.lg.isumi.citywww
Isumi City Hall

Isumi (いすみ市 Isumi-shi) is a city located in Chiba Prefecture, Japan.

As of April 1, 2012, the city has a population of 40,185 and a population density of 255 persons per km². The total area is 157.50 km².[1][2][3]


  • Geography 1
    • Surrounding municipalities 1.1
  • History 2
  • Economy 3
  • Transportation 4
    • Rail 4.1
    • Highways 4.2
  • Local attractions 5
  • Notable people from Isumi 6
  • Sister city relations 7
  • References 8
  • External links 9


Isumi is located on the east coast of southern Chiba Prefecture, on the Bōsō Peninsula. It is bordered by the Pacific Ocean to the east, and enjoys a temperate maritime climate, with short, cool winters and hot, humid summers due to the effects of the Kuroshio Current offshore. The area is noted for its beach resorts, and the landscape consists of rolling, sandy hills. The Isumi River, a small river which runs through this portion of the peninsula, empties into the Pacific Ocean at Misaki. Parts of the city are within the Minami Bōsō Quasi-National Park.

Surrounding municipalities


Isumi is part of ancient Kazusa Province. During the Edo period, the area was mostly tenryō territory ruled by various hatamoto on behalf of the Tokugawa shogunate. The former town of Isumi was established on April 29, 1955 from the merger of former Kuniyoshi Town with two neighboring villages.

The present city of Isumi was created on December 5, 2005 when the former town of Isumi absorbed the neighboring towns of Misaki and Ōhara (all from Isumi District).


The local economy is dominated by commercial fishing. Ise-ebi, a species of spiny lobster, is a notable product of Isumi, as are sardines and Japanese amberjack. The middle reaches of the Isumi River provide irrigation for extensive rice production in Isumi. The area also produces tomatoes and cucumbers.[2][3] The economy is supplemented by the summer tourist traffic to the local beach resorts.


Isumi is approximately 1 hour and 10 minutes from Tokyo Station by limited express train via Ōhara Station on the JR East Sotobō Line. Ōhara Station is also the connecting point for the JR East Sotobō Line and the Isumi Railway Company Isumi Line, which connects the Pacific Coast of east Chiba Prefecture to the interior areas of the Bōsō Peninsula.[3]



Local attractions

Notable people from Isumi

Sister city relations


  1. ^ a b Yoshimura, Kenji (13 August 2012). 災害時相互応援協定:いすみ市など2市2町締結 /千葉. Mainichi Shinbun (in Japanese) (Mainichi Newspapers: Tokyo). Retrieved Aug 23, 2012. 
  2. ^ a b c d "酒". Nihon Daihyakka Zensho (Nipponika) (in Japanese). Tokyo: Shogakukan. 2012.  
  3. ^ a b c "いすみ" [Isumi]. Dijitaru Daijisen (in Japanese). Tokyo: Shogakukan. 2012.  

External links

  • Isumi official website (Japanese)
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