Book excerpt: This book investigates the connections between socio-structural aspects, individual agency and happiness in contemporary Japan from a life course perspective. The contributors examine empirical data on the processes which impact how happiness and well-being are envisioned, crafted and debated in Japan across the life-cycle. The book discusses the shifting notions of happiness during people’s lives from birth to death, analyzing the age group-specific experiences while taking into consideration people's life trajectories and historical changes. It points also out recent developments in regards to demographic change, late marriage, and the changing labor market.