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PERSPECTIVES Developing the Urban Underground Diverse Projects both Domestic and InternationalRenewal of Underground Malls in Yaesu (Tokyo) and ElsewhereAs part of the comprehensive development of the Yaesu area, Nikken Sekkei Civil Engineering (NSC) worked with Nikken Sekkei in the renewal of the Yaesu underground shopping mall following the demolition of an existing building, public passageways, and facilities, as well as in the design and construction of connecting public walkways. The underground shopping area renewal work has been conducted under very difficult conditions (with the station square, a major city thoroughfare, and other facilities directly above it); it also faced the challenge of minimizing hindrance to the ongoing business of the adjacent shops, as well as communicating and coordinating with traffic authorities (police), government agencies and so on.Since the 1980s, NSC has taken part in the planning and designs of many new underground malls in Japan, including projects in Kawasaki, Kobe, Osaka, Kyoto, Hiroshima, and 調調調 19803040Hakata, in addition to the Yaesu project in Tokyo. Many underground malls are now 30 to 40 years old, and underground facilities need to be strengthened against earthquake and other disasters. Their renewal is in increasing demand.Transportation Node Integrating Above and Under Ground FeaturesAn underground shopping district is usually constructed beneath a station plaza and adjacent main streets linking major buildings in the area to transportation facilities. All this forms an important transportation concourse. In many cases redevelopment of such concourses and renewal of the underground shopping center with many street-level entrances/exits are undertaken at the same time. In the case of Yaesu, too, redevelopment of the newly landscaped plaza in front of Tokyo Station has been conducted along with the renewal of the underground mall. Such reconstruction projects are a forte of NSC, which has also been 12Photography1KudoPhoto2Kai Nakamura142015 Spring 22

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