Japan Naturalisation

Japanese nationality, which requires giving up your existing citizenship. The Act still says five years of residence, while the screening standard moved to ten for applications filed from 1 April 2026.

Programme snapshot

Item	Current rule
Main audience	Long-term residents who want Japanese nationality
Route family	settlement
Validity	Permanent
Stay per entry	Not applicable
Threshold	Five years under the Act, ten years under the screening standard. Conduct, livelihood and language also assessed
Renewal	Not applicable
Settlement	Direct
PR clock	Not applicable. Naturalisation is a separate grant, and time on permanent residence counts toward residence
Citizenship clock	5 years in the Act, 10 years in the screening guideline
Family	Each adult applies individually
Local employment	Yes, no restriction
Tax headline	Citizen, taxed on worldwide income with no remittance exception
Processing	12 to 24 months, with interviews and a home visit

Why it exists

Naturalisation converts a foreign resident into a national. It ends the immigration system entirely: no status, no renewal, no revocation, and a Japanese passport.

The cost is the passport you already hold. Japan does not permit dual nationality for adults, and the Ministry of Justice checks that you have renounced or attempted to renounce. Some countries make that slow or refuse to release their nationals, in which case Japan asks for proof of effort rather than proof of completion.

What the screening looks like

The Nationality Act requires five years of continuous residence, good conduct, sufficient livelihood, renunciation of other nationalities, and no allegiance to a foreign constitution. In practice the screening is broader than the statute.

Since 1 April 2026 the administrative guideline looks at ten years of residence, five years of tax payment, pension and health insurance compliance, elementary Japanese, and conduct. That change was made by guideline rather than by amendment, so it can move again without legislation.

Officials interview the applicant, interview the family, and visit the home. They check that you live where you say, that the household matches the file, and that your account of your own history is consistent. Traffic offences and unpaid fines count, and one serious driving offence can delay or end an application.

Application flow

Confirm the residence record against the guideline, not the Act.
Clear tax, pension and health insurance arrears. These are checked directly.
Prepare the family register, residence certificate, tax records, employment evidence and a statement of livelihood.
File at the Legal Affairs Bureau with jurisdiction over your address.
Attend interviews, usually two, and a home visit.
Wait. Processing runs twelve to twenty four months.
Complete renunciation of your existing nationality, or document the attempt.

Good fit

Someone who has built a life in Japan over a decade, speaks conversational Japanese, has a Japanese family, and holds a nationality they are willing to give up.

Poor fit

Anyone who wants to keep their existing passport. Anyone with tax or pension gaps. Anyone whose home country refuses to release its nationals, since that turns a clear rule into a discretionary judgement.

Watchpoints

Dual nationality is not permitted for adults. Renunciation is a condition, not a formality.
The ten year standard is a guideline, not a statute. It can change without a bill.
The Act still says five years. Do not plan against the Act alone.
Traffic offences and unpaid fines count. They show up in the conduct assessment.
Renunciation can fail through no fault of yours. Keep evidence of every attempt.
Permanent residence is usually the better first step. It keeps your passport and can be converted later.

Sources

Ministry of Justice, naturalisation guidance, checked 2026-10-23
Nationality Act, Articles 4 and 5, checked 2026-10-23
Japan Times reporting on the revised screening standard, 1 October 2026, checked 2026-10-23