Kajima Overseas Asia (KOA) is a regional operating arm of Kajima Corporation (since 1840) a leader in the global design, construction, and real estate development industry. KOA has its group companies operating in every corner of Southeast Asia; Singapore, Vietnam, Malaysia, Thailand, Indonesia, Philippines and Hong Kong. KOA in Vietnam provides the services in 2 major business areas: - Building and Interior Design; - General Construction and Project Management.