#12499 | posted by  banzaitokyo | 8 years, 6 months ago on Is it hard to become a Japanese citizen or a permanent resi…

To add to Yubi's answer, it is important to note that Japan doesn't allow its citizens to have other country's passports. So when you receive Japanese citizenship, you are required to abandon your first citizenship. But I am not sure how strict they are with enforcing this rule. I know about cases where people kept second citizenship along with the Japanese.