# Japan Citizenship Requirements

Japan's five-year statutory domicile condition and the stricter ten-year integration assessment introduced in April 2026 are different requirements.

Scope: Selected ordinary adult naturalisation requirements, including the assessment policy effective 1 April 2026; not special family, birth or former-national routes.

Jurisdiction: Japan: Japanese nationality. Sources reviewed 2026-09-17; review due 2026-12-16.

General information, not legal advice or a finding of eligibility. Requirements depend on the route, applicant and filing date. Verify the official instructions before applying.

## Five-year statutory minimum

Article 5 sets a minimum of five consecutive years domiciled in Japan with valid residence status. Meeting this statutory condition does not guarantee permission: the newer integration assessment below must also be considered.

Evidence: conditional. [Japan Ministry of Justice: Nationality Q&A](https://www.moj.go.jp/EN/MINJI/minji78.html); [Japan Ministry of Justice: Minister's press conference, 27 March 2026: stricter naturalisation assessment](https://www.moj.go.jp/hisho/kouhou/hisho08_00706.html). Source location: Nationality Q9(1); minister's explanation of the unchanged five-year statutory condition.

## Ten-year assessment policy from April 2026

From 1 April 2026, the Ministry generally requires at least ten years of residence when assessing integration into Japanese society. This is a discretionary assessment policy, not an amendment replacing Article 5's five-year minimum. Individual cases remain subject to assessment.

Evidence: conditional. [Japan Ministry of Justice: Minister's press conference, 27 March 2026: stricter naturalisation assessment](https://www.moj.go.jp/hisho/kouhou/hisho08_00706.html); [Asahikawa District Legal Affairs Bureau: Naturalisation guidance, updated 13 April 2026](https://houmukyoku.moj.go.jp/asahikawa/page000001_00453.html). Source location: 27 March announcement and questions on stricter assessment; Asahikawa integration paragraph. Effective from 2026-04-01.

## Practical Japanese ability

Current Legal Affairs Bureau guidance requires Japanese conversation, reading and writing sufficient for everyday life. It does not establish a JLPT or CEFR level here; no equivalence is inferred.

Evidence: documented. [Asahikawa District Legal Affairs Bureau: Naturalisation guidance, updated 13 April 2026](https://houmukyoku.moj.go.jp/asahikawa/page000001_00453.html). Source location: Integration paragraph following the Article 6–8 exceptions.

## Age, conduct and livelihood

Ordinary applicants must be at least 18 and legally capable under their home law. Conduct, tax compliance and a stable family-unit livelihood matter. The April 2026 policy also lengthens the reviewed history of tax and social-insurance payments without specifying a duration in the announcement.

Evidence: conditional. [Japan Ministry of Justice: Nationality Q&A](https://www.moj.go.jp/EN/MINJI/minji78.html); [Japan Ministry of Justice: Minister's press conference, 27 March 2026: stricter naturalisation assessment](https://www.moj.go.jp/hisho/kouhou/hisho08_00706.html). Source location: Nationality Q9(2)–(4); 27 March announcement on payment-history review.

## Existing nationality normally must be lost

Applicants normally must be stateless or lose their former nationality on naturalisation. An exception may apply where losing it is beyond their control. This is not an unrestricted dual-citizenship route.

Evidence: conditional. [Japan Ministry of Justice: Nationality Q&A](https://www.moj.go.jp/EN/MINJI/minji78.html). Source location: Nationality Q9(5), Article 5(2) exception.

## Local bureau and individual permission

Apply personally in writing to the Legal Affairs Bureau responsible for the home address, with identity and eligibility evidence. Constitutional-compliance conditions also apply; nationality begins when the permission is announced in the Official Gazette.

Evidence: conditional. [Asahikawa District Legal Affairs Bureau: Naturalisation guidance, updated 13 April 2026](https://houmukyoku.moj.go.jp/asahikawa/page000001_00453.html). Source location: Naturalisation definition; constitutional-compliance condition; application procedure.

## Scope and limitations

- Five years is not an assurance that an ordinary application will be approved under the current ten-year assessment policy.
- Family-related relaxations, detailed evidence, prior applications and any individual exception require the responsible bureau's advice. No processing time or automatic entitlement is claimed.

## Explore this passport

- [Passport rank and travel access](https://multipassrank.com/passport/japan)
- [Tax residence & income](https://multipassrank.com/passport/japan/taxes)
- [Country-profile JSON, including sources and scoped requirements](https://multipassrank.com/api/v1/country-profiles/JP)
- [Multiple-citizenship policy guide](https://multipassrank.com/dual-citizenship-countries)

[Canonical page](https://multipassrank.com/passport/japan/citizenship)