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Flag of Sōsa
Official seal of Sōsa
Location of Sōsa in Chiba Prefecture
Location of Sōsa in Chiba Prefecture
Sōsa is located in Japan
Coordinates: 35°42′27″N 140°33′51″E / 35.70750°N 140.56417°E / 35.70750; 140.56417Coordinates: 35°42′27″N 140°33′51″E / 35.70750°N 140.56417°E / 35.70750; 140.56417
Country Japan
Region Kantō
Prefecture Chiba Prefecture
 • Mayor Yasunori Ohta
 • Total 101.78 km2 (39.30 sq mi)
Population (April 1 2012)
 • Total 39,379
 • Density 387/km2 (1,000/sq mi)
Time zone Japan Standard Time (UTC+9)
-tree Podocarpus macrophyllus
• Flower Tulip
• Bird Japanese bush-warbler
Phone number 0479-73-0084
Address 793-2 Yōkaichiba Sasakawa Sōsa-shi, Chiba-ken 285-8510
Website City of Sōsa
Sōsa City Hall

Sōsa (匝瑳市, Sōsa-shi) is a city located in northeastern Chiba Prefecture, Japan.

As of April 2012, the city has an estimated population of 39,379 and a population density of 387 persons per km2. The total area is 101.78 km2.


Sōsa is located in far northeastern Chiba Prefecture. It is bordered to the north by the Pacific Ocean on the southwest. The land is mostly flat, and much is from 40–50 meters above sea level in average elevation.

The northern section, a mixture of valleys, ports and rice fields, consists of a plateau made up of complicated terrain and features. The southern half consists of flat terrain facing Kujūkuri Beach.

Through the center of the city runs both the Japan Railways (JR) Sōbu Main Line and Japan National Route 126, which run east-west. To the west of the center of Sosa is Japan National Route 296, which runs north-south.

Neighboring municipalities[edit]


Sōsa was founded on January 23, 2006 as a result of the merger between the former city of Yōkaichiba, and the former town of Nosaka (from Sōsa District).

Sōsa City History Timeline

A 8 December 1915
B 3 November 1948
C 31 March 1954
D 1 July 1954
E 17 July 1954
F 23 January 2006



Population distribution of Sosa, Chiba, Japan.svg

Sōsa City and National Population Sōsa City Population
Distribution by Age (2005) Distribution by Gender (2005)
= Sōsa City = Male
= Japan (National) = Female

Census statistics[edit]

1970 40,186
1975 40,559
1980 41,160
1985 42,226
1990 42,261
1995 43,357
2000 42,914
2005 42,086
2010 39,826

Source: Japan Statistics Department, Ministry of Internal Affairs and Communications / National Census (translated)


Sōsa is a regional commercial center whose economy is primarily agricultural. Sōsa is well known for growing trees that are sold all over Japan.

Major retail[edit]


  • Cainz Home Super Center, Yōkaichiba (Includes Beisia supermarket)
  • Ocean Mart 126 (shopping mall)

Financial institutions[edit]

  • Chiba Bank, Yōkaichiba Branch
  • Chiba Industrial Bank, Yōkaichiba Branch
  • Keiyo Bank, Yōkaichiba Branch
  • Choshi Credit Union, Yōkaichiba Branch


High schools[edit]

  • Sōsa Prefectural Public High School, Chiba Prefecture
  • Keiai University Yōkaichiba High School

Junior high schools[edit]

  • Yōkaichiba Public Junior High School No. 1
  • Yōkaichiba Public Junior High School No. 2
  • Nosaka Public Junior High School

Elementary schools[edit]

  • Heiwa Public Elementary School
  • Chinkai Public Elementary School
  • Yōkaichiba Public Elementary School
  • Sosa Public Elementary School
  • Toyosaka Public Elementary School
  • Suka Public Elementary School
  • Kyoko Public Elementary School
  • Yoshida Public Elementary School
  • Iidaka Public Elementary School
  • Toyowa Public Elementary School
  • Sakae Public Elementary School
  • Noda Public Elementary School



Bus transportation[edit]

Municipal bus routes[edit]

  • Purple Line (to Toyosaka, Yoshida)
  • Pink (to Idaka, Sosa)
  • Orange (to Toyowa, Chinkai)
  • Yellow (to Heiwa, Kyoko)
  • Light Green (to Noda, Eastern-Suka)
  • Light Blue (to Sakae, Western- Suka)

Major bus companies[edit]

Highway bus[edit]

Yōkaichiba Bus Route (Tokyo Station - Sōsa City Hall)[edit]

Bus stops at the following areas:

  • Tokyo Station (Departing from Tokyo Station: Yaesu Entrance, Arriving at Tokyo Station: Nihonbashi Entrance)
  • Tomisato Bus Terminal
  • Tomisato Nanae Square
  • Radison Hotel
  • Sanrizuka Park
  • Jitaku (Residential) Entrance
  • Kuko Hakubutsukan (Aviation Museum)
  • Shiromasu
  • Somei
  • Tako
  • Tako Michi no Eki (Road Station)
  • Yoshida
  • JR Bus- Yōkaichiba Branch
  • JR Yōkaichiba Station
  • Sōsa City Hall
Choshi-Chiba-Makuhari Route[edit]

Bus stops at the following areas:

  • License (Menkyo) Center
  • JR Kaihimmakuhari Station
  • Chiba Minato Station (Monorail)
  • Chiba Central Station (Keisei)
  • JR Chiba Station
  • Chuo 3 Chome (Central District 3)
  • Matsuo-Yokoshiba IC (Highway Interchange)
  • Matsuo
  • Yokoshiba
  • Iigura
  • Yokaichiba
  • Sosa City Hall
  • JR Higata Station
  • Asahi
  • Unakami
  • Iioka Health and Welfare Center
  • Iioka
  • Kousoku Yagi
  • Kousoku Obama
  • Kousoku Misakicho
  • Toshiba
  • Jinyacho


National highways[edit]

Prefectural roads[edit]

Main artery roads[edit]
  • Chiba Prefectural Road 16, Sawara – Yōkaichiba Line
  • Chiba Prefectural Road 30, Iioka – Ichinomiya Line
  • Chiba Prefectural Road 45, Yōkaichiba – Yachimata Line
  • Chiba Prefectural Road 48, Yōkaichiba – Nosaka Line
  • Chiba Prefectural Road 49, Yōkaichiba – Sakae Line
  • Chiba Prefectural Road 74, Tako – Sasamoto Line
General roads[edit]
  • Chiba Prefectural Road 104, Yokaichiba – Idono – Asahi Line
  • Chiba Prefectural Road 106, Yokaichiba – Sawara Line
  • Chiba Prefectural Road 109, Yokoshiba Depot – Yoshida Line
  • Chiba Prefectural Road 114, Yokaichiba – Yamada Line
  • Chiba Prefectural Road 122, Iioka – Katakai Line
  • Chiba Prefectural Road 149, Yōkaichiba – Fuma Line
  • Chiba Prefectural Road 212, Yōkaichiba Depot Line
  • Chiba Prefectural Road 299, Heiwa – Kyoko Line
Farm road[edit]
  • Toso Region Farm Roads

Area highways, toll roads[edit]

Choshi Renraku Road[edit]
  • Currently the above road is not within city limits, but according to plans, the Yōkaichiba IC (Interchange) is planned for construction. The plan is to extend the road from Yokoshiba-Hikari IC area toward the city of Choshi.

Places and events[edit]


  • Oio Shrine which dates back to Emperor Sujin Era, Year 7 (258 AD)
  • Iidaka Temple (known locally as “Iidaka Danrin (ato)”)
  • Chōtoku Temple
  • Chōfuku Temple (in Kawamukai area)
  • Shingon-Chisan, Buddhist Sect (Setsubun Buddhist Mass is held every new year)
  • Suka Eastern Orthodox Church

Exhibition and community areas[edit]

  • Matsuyama Art Museum
  • Fureai Koen (Park)- Yōkaichiba
  • Formally named the “Municipal and Agricultural Exchange Terminal Community Park of Yōkaichiba”, Sosa City established and controls this institution for the promotion of activity in local industry with the intention of exchange between the municipal and the agricultural parts of the city.
  • Horikawa-hama (Beach) Swimming Area
  • At a shoreline of roughly 150m, this beach area's waves are calm compared to nearby Kujukuri Beach.


  • Odaka Hadaka Matsuri (early January)
  • Jinkumi Lion Dance (every January)
  • Yōkaichiba Bon Festival Dance
  • (Yaegaki Shrine) Gion Festival (every August 4 & 5)
  • Yokappe Festival (every October)

Notable people of Sōsa[edit]

  • Kan Kase (former member, Japanese National Diet)
  • Takeo Chii (actor, local promoter)
  • Nobuko Sakuma (actress, fashion model)
  • Arekisanda Oryō (Comedian)
  • Yumiko Kobayashi (voice actress)
  • Shigeya Iijima (baseball player, Japan professional league)
  • Masaru Uno (baseball player, Japan professional league)
  • Nichirō (Buddhist prelate, Kamakura Era)

External links[edit]