I will only use NMM . Bethesda can ' t even make a fucking game without giant fucking bugs . Why would their mods be any different ? <| sep |> Two options exist , permanent residence or naturalization . Naturalizing requires you to give up your current citizenship some exceptions exist to that , such as citizens from countries that do not make it possible to give it up . But you must already be in Japan , and be able to prove that you have enough roots in the country to justify your application . There are many roads to permanent residence , assuming you have some way of getting residence in Japan in the first place . The fastest is marriage to a Japanese citizen and residence in Japan Dependent visa PR . Another quick way is via the Highly Skilled Worker visa HSW 1 5 y HSW 2 no expiry PR , but the rules look like they will change to make this the fastest method 1 year to PR soon . Other visa categories are generally 10 years to PR . Citizenship never expires , assuming that it is not revoked also possible . PR can expire if you stop living in Japan , such as if you leave on a special reentry permit and do not return within 1 year . There are so many rules . Maybe consult an immigration lawyer .