Portopia '81 (Japanese: 神戸ポートアイランド博覧会), also abbreviated "Portopia", was an exhibition in Japan held at Port Island and March 20 - September 15, 1981.

Its theme was "Creation of a New Cultural City on the Sea". Portopia was organized to commemorate the opening of Port Island. It was visited by over 16 million people.

Pavilions Theme Pavilion Hyogo Prefecture Pavilion Kobe Pavilion Kawasaki Steel Earth Pavilion Kobe Steel Portorama Pavilion Suntory Water Land Midori Pavilion - Sanwa Group. Kobe Planetarium Theater Daiei Pavilion Omnimax Theater Sumitomo Pavilion Mitsubishi Pavilion IBM Kentoshi Pavilion Sanyo Solarium KEPCO Future Energy Pavilion Osaka Gas Wonderland UCC Coffee Pavilion Fuyo Group Pavilion Green Air Dome Heartpia Mitsui Group Pavilion Solar Pyramid Matsushita Pavilion Fresh Life '81 Fashion Live Theater Minami Galathee Pavilion Tobacco & Salt Paviion - Japan Tobacco and Salt Public Corporation. Port Oasis Amateur Radio Pavilion - Japan Amateur Radio League. International Pavilion No.1 United Arab Emirates State of Paraná State of Washington Finland United Nations International Pavilion No.2 West Germany Bulgaria Rotterdam Marseille Riga UNESCO South Pacific Pavilion - Australia, Solomon Islands, Tuvalu, Tonga, West Samoa, Vanuatu, Papua New Guinea, Fiji, Hawaii, Northern Mariana Islands, Guam, New Caledonia, and French Polynesia shared the same booth. International Communication Pavilion - KDD. EXPO'85 International Pavilion No.3 - Saudi Ports Authority. Large exhibition hall - Using the Kobe International Exhibition Hall. Tianjin Pavilion Telecom Pavilion - NTT. Local Government Pavilion Toban-Yosui Irrigational Canal Pavilion International Pavilion No.4 Sri Lanka Mexico Limited time booth - Philippines, Thailand, Bhutan, Bolivia, and Chile shared the same booth. Indoor Event Venue - Using the Port Island Sports Center. Rokko Flood Control Pavilion Panda Pavilion

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