Shinshiro, Aichi

Shinshiro (新城市, Shinshiro-shi) is a city located in Aichi Prefecture, Japan. As of 1 November 2019, the city had an estimated population of 46,103 in 17,691 households [1], and a population density of 2 persons per km². The total area of the city is 499.23 square kilometres (192.75 sq mi).


Battle of Nagashino Festival


Location of Shinshiro in Aichi Prefecture
Coordinates: 34°54′57.3″N 137°29′55″E
RegionChūbu (Tōkai)
  MayorRyoji Hozumi (since October 2005)
  Total499.23 km2 (192.75 sq mi)
 (November 2019)
  Density92/km2 (240/sq mi)
Time zoneUTC+9 (Japan Standard Time)
City symbols 
• TreePrunus serrulata
• FlowerLilium auratum
• BirdEurasian scops-owl
Phone number0536-23-1111
Address6-1 Higashi-Iribune, Shinshiro-shi, Aichi-ken 441-1392
WebsiteOfficial website


Shinshiro is located in east-central Aichi Prefecture. Much of the northern and eastern portion of the city area is covered in mountains and forest, and most is within the borders of the Aichi Kōgen Quasi-National Park

Neighboring municipalities


Per Japanese census data,[2] the population of Shinshiro has started to decline rapidly over the past 20 years.

Historical population
1960 59,891    
1970 54,042−9.8%
1980 54,239+0.4%
1990 54,583+0.6%
2000 53,603−1.8%
2010 49,871−7.0%


The city has a climate characterized by hot and humid summers, and relatively mild winters (Köppen climate classification Cfa). The average annual temperature in Shinshiro is 15.4 °C. The average annual rainfall is 1931 mm with September as the wettest month. The temperatures are highest on average in August, at around 27.0 °C, and lowest in January, at around 5.0 °C.[3]


The area of present-day Shinshiro was part of the territories of the Okudaira clan, the predecessors of the Matsudaira clan and Tokugawa clan during the Sengoku period. Their stronghold, Nagashino Castle in what is now the northern part of Shinshiro, was the site of the Battle of Nagashino, between the forces of Oda Nobunaga and the Takeda clan. Noda Castle, at which Takeda Shingen was wounded at the Siege of Noda was also located within the borders of Shinshiro. During the Edo period, most of the area was tenryō territory ruled directly by the Tokugawa shogunate through hatamoto administrators.

After the start of the Meiji period, Shinshiro Town in Minamishitara District, Aichi Prefecture was proclaimed on 1 October 1889 with the establishment of the modern municipalities system. The area of the town expanded through annexation of neighboring villages in 1955 and 1956. The city of Shinshiro was proclaimed on 1 November 1958.

On 1 October 2005, the town of Hōrai, and the village of Tsukude (both from Minamishitara District) were merged into Shinshiro. The city of Shinshiro now covers all of former Minamishitara District.


Shinshiro has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 18 members. The city contributes one member to the Aichi Prefectural Assembly. In terms of national politics, the city is part of Aichi District 14 of the lower house of the Diet of Japan.


Shinshiro is a regional commercial center, with the economy concentrated on agriculture, especially chicken farming, and light manufacturing.


Shinshiro has 13 public elementary schools and six public junior high schools operated by the city government, and one public high school operated by the Aichi Prefectural Board of Education. There are also one private high school.



Central Japan Railway Company - Iida Line


Sister city relations

Shinshiro was part of the 1998 summit of worldwide cities named "New Castle" with:

Local attractions

Notable people from Shinshiro


  1. Shinshiro City official statistics (in Japanese)
  2. Shinshiro population statistics
  3. Shinshiro climate data
  4. "International Exchange". List of Affiliation Partners within Prefectures. Council of Local Authorities for International Relations (CLAIR). Retrieved 21 November 2015.
  5. "US-Japan Sister Cities by State". Asia Matters for America. Honolulu, HI: East-West Center. Retrieved 20 November 2015.
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