 This late Meiji period structure employed the latest technology of the time, including steel beams and reinforced concrete floor slabs as well as electrical circuits, gas and steam heat.In the period between the end of the Meiji era and the outbreak of World War II, Sone and Chujo also designed many other buildings for Keio University including the Keio Corporate Administration Building and the First School Building, both still features of the Mita campus.Sone as superintendent, together with his former university instructor Josiah Conder as architect, was also responsible for many of the famed red-brick Mitsubishi buildings at Marunouchi, Tokyo.