The number of dual-income families in Tokyo, whose children undertake the rigorous process of elementary school entrance exams, is notably increasing. This growth reflects societal changes in Japan, as more families necessitate the inclusion of both parents in the workforce. Parents are increasingly focusing on their children's early education, leading to a rise in the trend of young students being prepared for entrance examinations. This shift may influence future changes in Japan's educational system.

Education in Japan is highly competitive and starts from a very early age. The rise in dual-income families concurrently taking an interest in this rigour could be due to the evolving work culture in Japan, stirring a shift in domestic and educational culture. It's also reflective of a larger conversation around work-life balance and the role of gender in the workforce.

This contrasts with countries like the US or in the EU, where there is less focus on elementary school entrance exams and more emphasis on overall child development and creativity. The participation of both parents in the workforce is common in these countries, but the balance of work, education, and parenity tends to be approached differently.