What is the competent legal bureau?

Which Legal Affairs Bureau you apply for naturalization depends on the prefecture or municipality where you live.
Will definitely goJurisdiction of the Legal Affairs BureauLet's find out.
The application for naturalization will be made to the Legal Affairs Bureau,Not every Legal Affairs Bureau can do it.
Even if you live in Tokyo, depending on the region where you live, you cannot apply at the headquarters of the Legal Affairs Bureau, but you must apply to each branch office.
There are legal offices in Tokyo, Osaka, Nagoya, Hiroshima, Fukuoka, Sendai, Sapporo, and Takamatsu. Search for the jurisdiction from the municipality where your address is located.

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