S-22 Neutrition and Health : Dietary intake for Living Healthfully   S22-1. What We Learn from Human Studies: Difficulties, Attractiveness, and Importance of Nutritional Epidemiology   S22-2. Energy Consumption and Related Issue of Japanese   S22-3. Dietary Reference Intakes of Protein and Protein Quality Evaluation   S22-4. How to Estimate Vitamin Insufficiency/Sufficiency: Who Needs the Aid of Vitamin Supplement ?   S22-5. Calcium Requirement for Japanese