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.”
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”.