Japan faces a demographic crisis that could reshape its economic future. Within three generations, the country could encounter serious structural challenges. The data tells a sobering story: the proportion of people alive today who will actually have grandchildren has hit its lowest point in recorded history. This isn't just a social issue—it's an economic tipping point. Shrinking populations mean fewer workers supporting retirees, reduced consumer demand, and potential asset deflation. For investors watching global economic cycles, Japan's trajectory serves as a cautionary case study on how demographic collapse reshapes markets and long-term wealth preservation strategies.