Every other country here publishes a CEFR number. Japan doesn’t — not for PR, not for naturalization. That doesn’t mean language doesn’t matter.
No statutory language test exists. The Immigration Services Agency’s published criteria run on residence length (generally 10 years, shorter for some visa categories and Highly Skilled Professional points holders), good conduct, independent means, and a clean tax/pension/health-insurance payment record. Language simply isn’t a listed criterion today.
That may not last. ISA project-team reporting has recommended adding a mandatory Japanese-language and lifestyle programme, possibly with a formal test, as part of a reform package targeted around April 2027. The exact benchmark being discussed varies by report — somewhere around N3/B1-equivalent in one account, N2 in another — and nothing is settled yet. Worth checking back on if your timeline runs past 2027.
The Nationality Act’s Article 5 criteria — residence, age, conduct, means, giving up prior nationality, loyalty to the constitution — don’t list a language requirement either. In practice, the Ministry of Justice’s administrative guidance expects applicants to read, write and converse in Japanese as a working member of society, assessed informally at interview. Commonly cited (unofficial) practical benchmarks sit around JLPT N4–N3, roughly elementary-school-graduate level — and reportedly, specific Legal Affairs Bureaus (Tokyo and Yokohama among them) apply this more strictly than others.
One separate, genuinely useful fact: the Highly Skilled Professional visa’s points system awards real points for JLPT level — N1 worth more than N2 in the scoring breakdown — which can accelerate the visa track that eventually leads toward PR, even though it isn’t a PR requirement itself.