Una altra preocupació de Yamaguchi era que l'autora s'havia centrat en les àrees urbanes i ignorava "el problema de les zones rurals on l'impacte del descens de la natalitat és bastant greu”.
Another concern of Yamaguchi’s was that the author likely focused on urban areas, failing to address “the problem in the countryside where the decrease in number of children has quite a serious impact.”