#12500 | posted by  Yubi | 8 years, 6 months ago on Is it hard to become a Japanese citizen or a permanent resi…

Correct. Japan's goal is to not allow dual citizenship, but that is not so practical since some countries do not have a way to renounce citizenship. So, the practiced rule is to make using a passport from a different country illegal. The kids can have dual citizenship until they are 20.