Part 1 Declining Birthrate and Aging.- 1 Japanese Social Welfare System Reform and Transformation of Social Governance.- 2 Aging Population, Decreasing Birthrate and National Security.- Part 2 Technological Innovation and Society Changes.- 3 The Impact of Modern Technology on Japanese Studies.- 4 Social technology research in Japan as a public good.- 5 The new overseas Chinese in Japan: What case studies tell us.- Part 3 Robust Society against Natural Disasters.- 6 People with Different Ability and Disaster-Lesson Learnt from Jogjakarta Post Earthquake 2006-2016.- 7 Advertising media channels and post-disaster destination: a case of Japan.