History

• December 15, 1889 - Due to the municipal status enforcement, the villages of Doi, Urayama, Irino, and Hatano merged to form the village of Doi, Uma District
  Uma District, Ehime
  was a district located in Ehime Prefecture. Due to the mergers, the district dissolved on April 1, 2004.Before the mergers as of 2003, the district had an estimated population of 19,040 with the total area of 165.50 km².-History:...
  
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• March 31, 1954 - Merged with the villages of Nagatsu, Kofuji, Tenma, Kaburasaki, and Sekigawa to become the town of Doi
  Doi, Ehime
  was a town located in Uma District, Ehime, Shikoku, Japan.On April 1, 2004 Doi was merged with the village of Shingū, also from Uma District, and the old cities of Iyomishima and Kawanoe, to form the new city of Shikokuchūō....
  
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• April 1, 2004 - The town of Doi merged with the village of Shingū
  Shingu, Ehime
  was a village located in Uma District, Ehime, Japan.On April 1, 2004 Shingū was merged with the town of Doi, also from Uma District, and the old cities of Iyomishima and Kawanoe, to form the new city of Shikokuchūō....
  
   and the cities of Kawanoe
  Kawanoe, Ehime
  was a city located in Ehime, Japan.On April 1, 2004 Kawanoe was merged with the town of Doi, the village of Shingū, both from Uma District, and the old city of Iyomishima, to form the new city of Shikokuchūō....
  
   and Iyomishima
  Iyomishima, Ehime
  was a city located in Ehime, Japan.On April 1, 2004 Iyomishima was merged with the town of Doi, the village of Shingū, both from Uma District, and the old city of Kawanoe, to form the new city of Shikokuchūō....
  
   to become the city of Shikokuchūō
  Shikokuchuo, Ehime
  is a city located in Ehime, Japan.Shikokuchūō is the leading producer of paper and paper products in Japan. It is also a port city and one of Ehime’s major centers of industry....
  
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