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| | Tsukuba District, Ibaraki - Wikipedia, the free encyclopedia |
 | | February 1, 1955 - The towns of Tsukuba and Hojo, and the villages of Tamizuyama, Tai, and Oda merged, forming the town of Tsukuba. |
 | | March 1, 1955 - The villages of Yahara, Towa, and Fukuoka merged with the village of Kokinu from Kitasouma District, forming the village of Yawara. |
 | | November 30, 1987 - The towns of Yatabe, Toyosato, and Oho merged with the village of Sakura from Niihari District to form the city of Tsukuba. |
| en.wikipedia.org /wiki/Tsukuba_District,_Ibaraki (453 words) |
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