Sakura-mura(08466) in Niihari-gun, Yatabe-machi(08481), Toyosato-machi(08484) and Oho-machi(08486) in Tsukuba-gun are merged, and Tsukuba-shi(08220) is newly established.
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桜村(08466)、谷田部町(08481)、豊里町(08484)、大穂町(08486)が合併し、つくば市(08220)を新設
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1987-11-30
^^http://www.w3.org/2001/XMLSchema#date
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