Final answer:
Japan and Germany are in 5)Stage 5 of Rostow's model, which is the Age of High Mass Consumption, indicating advanced, consumer-oriented economies.
Step-by-step explanation:
Highly-industrialized countries like Japan and Germany fit into Stage 5: Age of High Mass Consumption of Rostow's five-stage model of economic growth.
This stage is characterized by high levels of industrial activity, urban growth, high income based on a consumer economy, and smaller family sizes.
These countries have undergone a long process of economic development, marked by the transition from agricultural to industrial economies .
And now representing post-industrial societies with a focus on consumer services, high standard of living, and an urban lifestyle.