Kamiiso-cho(01335) and Ono-cho(01336) in Oshima-shicho are merged, and Hokuto-shi(01236) is newly established.

上磯町(01335)、大野町(01336)が合併し、北斗市(01236)を新設

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http://data.e-stat.go.jp/lod/terms/sacs#CodeChangeEvent

http://data.e-stat.go.jp/lod/sac/C01236-20060201

http://data.e-stat.go.jp/lod/sac/C01335-20050124

http://data.e-stat.go.jp/lod/sac/C01335-20060201

http://data.e-stat.go.jp/lod/sac/C01336-20050124

http://data.e-stat.go.jp/lod/sac/C01336-20060201

http://data.e-stat.go.jp/lod/sacr/establishmentOfNewMunicipalityByMerging

2006-02-01 ^^http://www.w3.org/2001/XMLSchema#date