Ohba Co., Ltd. provides consulting services for city planning and infrastructure projects in Japan and internationally. The company offers consulting services for the planning of charming cities, as well as technical support services to land owners in relation to land use and land use conversion. It is also involved in the planning and design of roads, bridges, waterways, and water supply and sewage systems; and provision of technical services for creating social infrastructure. In addition, the company offers consulting services related to environmental research and assessments; and handles surveys and investigations involving geography and terrain. Further, it provides land and infrastructure maintenance and management services; and consulting services related to the disposal of real estate, as well as handles land, and drill boring and soil contamination investigations. Additionally, the company offers proposals involving geographic information and other related systems related to urban planning, civil engineering, environmental investigation, and preparation of spatial information. It also provides consulting services related to inheritance tax and real estate utilization, as well as proposes solutions for addressing various social issues. The company was founded in 1922 and is headquartered in Chiyoda, Japan.