Large numbers of people gather together and live in cities. Cities contain many buildings that are necessary for people's lives from daily living to work and entertainment. These include homes, public buildings, schools, hospitals, offices, factories, community centers, movie theaters, and shopping centers among others. These buildings are created under a variety of concepts to be used by a variety of people. Building these buildings is also part of Kumagai Gumi's work. For all buildings, for whatever application or purpose they are built, Kumagai Gumi has a common concept that runs through all of the work the company is involved with. That is to be able to use the building safely and without worry while also reflecting the wishes of the orderer and pursuing ease of use for the people using the building.