Osteoporosis liaison service (OLS) is a coordinator-based service provided by Japan Osteoporosis Society. Fracture Liaison Services, commonly known as FLS, are coordinator-based, secondary fracture prevention services implemented by health care systems for the treatment of osteoporotic patients. OLS includes not only FLS but also educational program, medical check-up for bone fragility and risk assessment for primary fracture in osteoporotic subjects. Japan Osteoporosis Society gives coordinators the certificate as a specialist for OLS since 2015. OLS in Japan should facilitate better performance of the treatment of osteoporosis and should contribute the reduction of clinical fractures.