Yotsukaido-machi(12321) in Inba-gun is changed to Yotsukaido-shi(12228).

四街道町(12321)が四街道市(12228)に市制施行

263

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

http://data.e-stat.go.jp/lod/sac/C12228-19810401

http://data.e-stat.go.jp/lod/sac/C12321-19770101

http://data.e-stat.go.jp/lod/sac/C12321-19810401

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

1981-04-01 ^^http://www.w3.org/2001/XMLSchema#date