Here’s a thought, 横浜では、英語しか話されていないと考えてみてください (Yokohama dewa, Eigo shika hanasarete-inai to kangaete-mite kudasai, imagine you could speak nothing but English in Yokohama).
What kind of city would it be? Do you think it would be more attractive to foreign residents? Would it make Japan more of a player on the world stage?
日本では少子高齢化が進み、人手不足が問題になっている (Nihon de wa shōshi kōreika ga susumi, hitode-busoku ga mondai ni natte-iru, Japan continues to face a decreasing birthrate and an aging population, and labor shortages have become a problem). But this could perhaps be solved by bringing in more 外国人労働者 (gaikokujin rōdōsha, foreign workers).