Mitsubishi Jisho Design got its start as Marunouchi Architectural Office in 1890, and soon after designed one of 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 iconic brick buildings in the central Marunouchi district of Tokyo. In the 1960s, responding to rapid economic growth and the burgeoning demand for office space, the area was transformed into an attractive 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 vibrant commercial and cultural district. Building on its core strengths of comprehensive design, urban insights, and the pursuit of essence and quality, Mitsubishi Jisho Design has led the development and renewal of the Marunouchi district for over 130 years, allowing it to bring unparalleled experience to bear in architectural and urban development projects throughout Japan and the world.