Established in 1957 and headquartered in Tokyo, Japan, Oriental Consultants Holdings Company Limited, which operated as ACKG Limited until its rebranding in December 2018, provides infrastructure management solutions across Japan and internationally through its subsidiaries. The company offers a broad spectrum of intellectual services, including research, planning, design, investigation, evaluation, guidance, maintenance, and operational management, with a focus on areas such as water supply, wastewater, waste, environmental concerns, and information systems. These services also encompass construction supervision, GIS, spatial information, surveying, measurement, traffic observation and analysis, information processing, and the sale or rental of specialized equipment. Furthermore, it delivers environmental management services covering geological and soil surveys, environmental remediation, structural surveys and renewal, hydraulic analysis, drilling, demolition, hot spring construction, and various services pertaining to residential land and construction transactions. Oriental Consultants Holdings also engages in software development and sales, in addition to real estate rental. Its offerings extend to construction management, measurement control, and asset management services, along with diverse IT solutions. The company also specializes in human resources and business process outsourcing, including management, temporary, and general staffing services.