"Shifts in Income Inequality and Social Class Dynamics" 

1. Income Distribution in Japan: How do you think income distribution in Japan is similar to or different from what was found in Spain, Italy, and Germany? Have there been any changes in the income levels of different social groups in Japan?

2. Role of Rich Families in Japan: The study talks about rich families (capitalists) in Spain and Italy becoming less wealthy, while in Germany, they are becoming richer. How do you think rich families in Japan are doing? Are they becoming more or less wealthy?

3. Wages for Top Earners in Japan: The study shows different trends in wages for the richest people in different countries. How do you think wages for the top earners in Japan compare? Have there been any changes in how much of their income comes from wages?

4. Social Classes and Income in Japan: In the study, wage earners mostly get their money from wages, while rich families earn more from profits. How do you think different social classes in Japan earn their money? Is it mostly from wages or from other sources like profits?

5. Managers and Workers in Japan: The study mentions that managers in Spain and Italy are becoming more common in the top income group. How do you think the situation is for managers and workers in Japan? Are managers becoming richer compared to regular workers?