Multiphasic health checkups aim to contribute to health promotion (primary prevention) and disease prevention (secondary prevention). All providers of multiphasic health checkups should make efforts to offer evidence-based user-oriented services and accomplish lifelong healthcare. This article lists unsolved problems in multiphasic health checkups and describes some ideas on how to approach these problems. The cooperation between scientific societies and service providers is essential for sustainable improvement in health promotion services and establishment of a lifelong healthcare system.