The roots of Mitsubishi JishoSekkei lie in the Marunouchi Architectural Office, the architectural design firm founded in 1890 which designed Japan’s first modern office building, the Mitsubishi Ichigokan (Building No.1). Over the subsequent decades, as the country modernized, the firm went on to design a series of iconicbrick buildings in the central Marunouchi district of Tokyo, the national capital. In the 1960s, respondingto rapid economic growth and the burgeoning demand for office space, the area was transformed into aharmonious central business district, with new buildings designed to conform to a uniform height of 31 meters. In the 21st century, these buildings have been replaced with high-rise towers and the area has been reimagined once more as a lively district with vibrant commercial and cultural functions. Mitsubishi Jisho Sekkei has led the development and renewal of the Marunouchi district across three generations, allowing it to bring unparalleled experience to bear in architectural and urban development projects throughout Japan and the world.