OYO Corporation is a Japan-based company mainly engaged in the infrastructure and maintenance business. It operates through four business segments. The Infrastructure and Maintenance business mainly provides solution services to support maintenance (maintenance, renewal) of social infrastructure. The Disaster Prevention and Disaster Mitigation business provides solution services to support toughening society and enterprises mainly against natural disasters (earthquakes, tsunamis, volcanic disasters, heavy rain disasters, sediment-related disasters, among others). The Environmental business provides solution services to support social environment preservation and measures to reduce burden on the global environment. The Resource and Energy business provides solution services to support the development, conservation and effective utilization of resources and energy.