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Shiwa (紫波町, Shiwa-chō) is a town in Iwate Prefecture, Japan. As of 31 March 2017, the town had an estimated population of 33,314, and a population density of 139.4 persons per km2. The total area of the town is 238.98 square kilometres (92.27 sq mi).[1]


Shiwa Town Hall
Shiwa Town Hall
Flag of Shiwa
Official seal of Shiwa
Location of Shiwa in Iwate Prefecture
Location of Shiwa in Iwate Prefecture
Shiwa is located in Japan
Coordinates: 39°33′15.8″N 141°09′19.7″E / 39.554389°N 141.155472°E / 39.554389; 141.155472Coordinates: 39°33′15.8″N 141°09′19.7″E / 39.554389°N 141.155472°E / 39.554389; 141.155472
 • Total238.98 km2 (92.27 sq mi)
 (March 31, 2017)
 • Total33,314
 • Density139.4/km2 (361/sq mi)
Time zoneUTC+9 (Japan Standard Time)
• TreeKeyaki
• FlowerKikyō
• BirdBarn swallow
Phone number019-672-2111
AddressHizume Nishiura 23-1 Shiwa-chō, Shiwa-gun, Iwate-ken 028-3390
Mount Kuromoriyama in Shiwa



Shiwa is located in central Iwate Prefecture, in the Kitakami River basin, south of the prefectural capital of Morioka. The Sannōkai Dam is located in Shiwa.

Neighboring municipalitiesEdit


Shiwa has a humid oceanic climate (Köppen climate classification Cfa) characterized by mild summers and cold winters. The average annual temperature in Shiwa is 10.3 °C. The average annual rainfall is 1326 mm with September as the wettest month and February as the driest month. The temperatures are highest on average in August, at around 24.0 °C, and lowest in January, at around -2.3 °C.[2]


Per Japanese census data,[3] the population of Shiwa has gradually increased over the past 40 years.

Census Year Population
1970 26,459
1980 27,787
1990 29,856
2000 33,038
2010 33,252


The area of present-day Shiwa was part of ancient Mutsu Province, and has been settled since at least the Jōmon period. The area was inhabited by the Emishi people, and came under the control of the Yamato dynasty during the early Heian period. During the Kamakura period, the area was ruled by a branch of the Northern Fujiwara, followed by the Shiba clan during the Muromachi period. During the Sengoku period, the area was conquered by the Nambu clan in 1588. During the Edo period, Shiwa prospered as a post station on the Ōshū Kaidō highway connecting Edo with the northern provinces, as well as from its location on the Kitakami River. Initially part of Morioka Domain under the Tokugawa shogunate, from 1684, four villages (Tsuchidate, Katayose, Inato and Kamihirazawa) formed an exclave of Hachinohe Domain.

During the Meiji period, this exclave became the village of Shiwa, and the town of Hizume and the villages of Furudate, Mizuwake, Akaishi, Hikobe, Sahinai, Akasawa, ane Nagaoka were established within Shiwa District on April 1, 1889 with the establishment of the modern municipalities system. These municipalities were merged on April 1, 1955 to form the new town of Shiwa.


The local economy of Shiwa is traditionally based on agriculture, primarily rice cultivation; however, due to its proximity to Morioka city, it is increasingly serving as a bedroom community.


Shiwa has eleven public elementary schools and three public junior high schools operated by the town government and one public high school operated by the Iwate Prefectural Board of Education.[4]


International relationsEdit

Notable people from ShiwaEdit


  1. ^ 詳細データ 岩手県紫波町. 市町村の姿 グラフと統計でみる農林水産業 (in Japanese). Ministry of Agriculture, Forestry and Fisheries. 2016. Retrieved 13 April 2017.
  2. ^ Shiwa climate data
  3. ^ Shiwa population statistics
  4. ^ Shiwa Town Board of Education(in Japanese)
  5. ^ a b "International Exchange". List of Affiliation Partners within Prefectures. Council of Local Authorities for International Relations (CLAIR). Archived from the original on 22 December 2015. Retrieved 21 November 2015.

External linksEdit