The Shinjuku Sumitomo building, fondly known as Sankaku (triangle) Building, is a high-rise building located in Tokyo. It was designed by Nikken Sekkei, and construction was completed in 1974. The…
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The Shinjuku Sumitomo building, fondly known as Sankaku (triangle) Building, is a high-rise building located in Tokyo. It was designed by Nikken Sekkei, and construction was completed in 1974. The…