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Expo '85, officially called , was a world's fair held in Tsukuba, Ibaraki, Japan (Tsukuba Science City, a planned city focused on technology north of Tokyo) between Sunday, March 17 and Monday, September 16, 1985. The theme of the fair was "Dwellings and Surroundings - Science and Technology for Man at Home". Attendance was over 20 million and 48 countries participated, along with several companies.