In the study of human settlements, an urban agglomeration is an extended city or town area comprising the built-up area of a central place (usually a municipality) and any suburbs linked by continuous urban area. INSEE, the French Statistical Institute, uses the term unité urbaine, which means continuous urbanized area. However, because of differences in definitions of what does and does not constitute an "agglomeration", as well as variations and limitations in statistical or geographical methodology, it can be problematic to compare different agglomerations around the world. It may not be clear, for instance, whether an area should be considered to be a satellite and part of an agglomeration, or a distinct entity in itself.
The term "agglomeration" is also linked to "conurbation", which is a more specific term for large urban clusters where the built-up zones of influence of distinct cities or towns are connected by continuous built-up development (Essen - Dortmund and others in the Rhine-Ruhr district), even in different regions, states or countries, (Lille - Kortrijk in France and Belgium). Each city or town in a conurbation may nevertheless continue to act as an independent focus for a substantial part of the area.
Sunshine City (サンシャインシティ, Sanshain Shiti?) is a building complex located in East Ikebukuro, Toshima, Tokyo. It is Tokyo's oldest city within the city and has the 240 metre tall Sunshine 60 skyscraper at its centre. It consists of four buildings and sits on land that was once occupied by Sugamo Prison.
The complex, which was opened in 1978, contains the Sunshine 60 building with an observatory (observation deck) located at the top, the Ancient Orient Museum, an aquarium, and a planetarium. It also features a Prince Hotel, Namco Namja Town, a convention centre, theatre, and a shopping mall.
Since it was opened, other observation decks have opened in Tokyo, such as at Roppongi and the Tokyo Government offices.
Media related to Sunshine City, Tokyo at Wikimedia Commons