Japan Permanent Residency vs Naturalization: A Complete Comparison, and Why 95% of Taiwanese Should Choose PR Over Naturalization
Published on March 1, 2026
PR lets you keep your Taiwan passport but gives no voting rights; naturalization gives you a Japanese passport but requires giving up Republic of China nationality. These are the two paths Japan offers long-term residents, but 95% of Taiwanese should stop at PR. Using Dr. G. consulting cases, this article breaks down the single most important lifetime decision.
Japan Permanent Residency vs Naturalization: A Complete Comparison, and Why 95% of Taiwanese Should Choose PR Over Naturalization
Published on May 14, 2026
Every November, Dr. G.'s office receives the same kind of message: "Teacher, I have worked in Japan for eight years. My PR application was just approved, and a senior colleague at my company said, 'Why not just apply for naturalization since you are already settled here?' What do you think?"
My answer has not changed in 15 years: "First, answer one question for me: when you are 70 and return to Taipei for your mother's funeral, what passport do you want to use to enter Taiwan? If you are willing to face Taiwanese immigration with a Japanese passport, then consider naturalization. Otherwise, PR is the endpoint."
Article 5, Paragraph 1, Item 5 of Japan's Nationality Act explicitly requires naturalization applicants to "lose their original nationality." In plain language, naturalizing as Japanese = you must give up Republic of China nationality. This is a 100% irreversible legal decision. Drawing on my practical experience guiding 80+ Taiwanese students in Japan from study abroad through PR, this article breaks down the differences, processes, and hidden traps of PR and naturalization.
1. Why This Is the "Single Most Important Decision" on the Japan Path
Here is the conclusion first: the difference between PR and naturalization is not "five more years of residence." It is "whether you are still a Republic of China national."
Many Taiwanese students, after working in Japan for 5-8 years, are encouraged by Japanese colleagues or older alumni to naturalize because "it is more convenient." What they do not realize is that once naturalization is complete, restoring Taiwanese nationality in the future is extremely difficult (requiring 1-3 years of residence in Taiwan, Ministry of the Interior review, and with multiple rejected cases). For the vast majority of Taiwanese families, this means:
Inheriting parents' real estate in Taiwan must proceed under the Act Governing the Choice of Law in Civil Matters Involving Foreign Elements as a "foreigner" (3-5 times more complicated)
Permanent loss of National Health Insurance eligibility
Permanent loss of voting rights as a Republic of China citizen
Entering Taiwan with a Japanese passport and completing a foreign visitor arrival card
A PR holder, however, can keep their Republic of China passport, Taiwan National Health Insurance, and Taiwanese citizenship while also enjoying permanent residence rights in Japan. This is the "best of both worlds" that Taiwanese families truly want.
For a complete breakdown of the "PR timeline," see .
Japan Permanent Residency vs Naturalization: A Complete Comparison, and Why 95% of Taiwanese Should Choose PR Over Naturalization | Study Abroad Blog | Dr.G. Academy
2. Side-by-Side Comparison of PR and Naturalization
Item
Permanent Residency (PR)
Naturalization
Nationality
Keep Republic of China nationality
Must give up Republic of China nationality
Period of stay
Indefinite
Permanent (= Japanese citizen)
Residence card renewal
Once every 7 years
Not required (Japanese passport holder)
Voting rights
None
Full national and local voting rights
Civil service
Mostly restricted
Fully open
Passport convenience
Republic of China (visa-free to 145 countries)
Japan (visa-free to 193 countries, world No. 1)
Mortgage loans
Some banks require a guarantor
Fully equivalent to citizens
Military service (Taiwanese men)
In principle still regulated
Exempt once nationality is lost
Inheriting Taiwan real estate
No issue
Inherits as a foreigner (procedure becomes far more complex)
Standard residence requirement
10 years (including 5 years of work)
5 years (including 3 years of work)
HSP 70 points
3 years
(HSP does not accelerate naturalization)
HSP 80 points
1 year (fast track)
No corresponding fast track
Application fee
¥10,000
¥0 (free)
Review period
6-12 months
10-14 months
Possibility of revocation
Yes (expanded from 2024-06)
Extremely low (requires plotting to harm Japan's national interests)
Note: Naturalization may look appealing because it has a "shorter residence period + no application fee," but the cost is giving up your original nationality. For most Taiwanese families, that cost is unaffordable.
3. PR Application Process and Residence Requirements
Household registration translation and notarization
¥10,000
NTD 2,000
Administrative scrivener service fee (optional)
¥150,000-300,000
NTD 30,000-60,000
Total self-filing cost
¥30,000-50,000
NTD 6,000-10,000
Total agency-assisted cost
¥180,000-330,000
NTD 36,000-66,000
4. ★ 2024-06-10 Expansion of PR Revocation Grounds (Red Flag)
Under Act No. 56 of June 16, 2023, effective from June 10, 2024:
New grounds for revocation (Immigration Control Act Article 22-4):
Delinquent taxes (national or local taxes) with intentional evasion
Delinquent social insurance premiums (National Pension, National Health Insurance, employment insurance)
Intentional false income reporting or failure to report
A sentence of imprisonment of one year or less (including suspended sentences) can be grounds for revocation
Enforcement intensity: From Q4 2024, the Tokyo, Osaka, and Nagoya Regional Immigration Services Bureaus have launched "PR holder tax and social insurance audit projects." In 2025, the number of revocations increased 3.5 times compared with 2023.
Dr. G. warning: PR is not "valid for life once obtained." You must continuously keep taxes and social insurance fully paid. Common traps for Taiwanese students include:
Forgetting to switch to National Health Insurance / National Pension during a gap between jobs
Failing to report side income
Failing to report rental income
Failing to report overseas income such as Taiwan real estate rental income or Taiwan stock dividends
Standard prevention: The first thing to do after obtaining PR is to hire a Japanese tax accountant (annual fee ¥100,000-200,000) to ensure there are no omissions in cross-border income reporting.
5. The Five Statutory Requirements for Naturalization
Under Article 5, Paragraph 1 of Japan's Nationality Act:
Legal provision
Requirement
Details
Item 1
Residence requirement
Has had a domicile in Japan continuously for 5+ years (including 3+ years on a work visa)
Item 2
Capacity requirement
Age 20+ and legally competent under the law of the home country
Item 3
Conduct requirement
No criminal record, taxes fully paid, good traffic record
Item 4
Livelihood requirement
Applicant or cohabiting family members have an independent livelihood
Item 5
★ Prevention of multiple nationality requirement
Loses original nationality or is able to lose it by personal choice
Item 6
Constitutional compliance
Has never plotted to destroy the Constitution or government of Japan
5.1 What Item 5, the "Prevention of Multiple Nationality Requirement," Really Means
Japan Nationality Act Article 14: when a Japanese national acquires a foreign nationality, they must choose one within two years
Japan Nationality Act Article 11: voluntarily acquiring a foreign nationality results in loss of Japanese nationality
Naturalization Article 5, Paragraph 1, Item 5: requires naturalization applicants to "lose their original nationality"
Taiwan Nationality Act Article 11: voluntary loss of nationality requires an application for permission from the Ministry of the Interior
Conclusion: Naturalizing as Japanese = you must go through a legal procedure to give up Republic of China nationality (an absolute point in legal principle).
5.2 Simplified Naturalization (Special Cases)
Married to a Japanese national for 3 years + 1 year in Japan (Nationality Act Article 7) → shortened residence requirement
Child of a Japanese national (including adopted child): 1 year
PR holder: 5-year requirement remains unchanged, but conduct and livelihood are easier to pass
5.3 Japanese Language Requirement
Express statutory requirement: none
In practice: oral questions during the Legal Affairs Bureau interview + simple writing test (around third-grade elementary school level, between N3 and N4)
Dr. G. recommendation: students who have passed N1 should have no pressure in the interview; below N3, there is a high chance of being asked to reapply
6. Naturalization Application Process and Documents
6.1 Application Location and Fees
Where to apply: Legal Affairs Bureau or District Legal Affairs Bureau (Nationality Division) for your place of residence
10-14 months (high case volume in 2025, average 12 months)
Official Gazette announcement → naturalization approval
10-14 months after application
Japanese passport application
1-2 weeks after announcement
Taiwan nationality loss registration
Following 1-3 months
6.3 Core Documents (30+ Items)
Application for naturalization permission, family summary, resume
Statement of motivation for naturalization (Japanese, 3-5 A4 pages, the most important document)
Employment and salary certificates, income and asset-related materials
Household registration transcript (Taiwan, translated and notarized)
Nationality certificate (issued by Taiwan's Ministry of Foreign Affairs)
Birth notarization, marriage notarization
Certificate of residence history
Tax and social insurance documents for the most recent 3 years
Copy of driver's license (for those with traffic violation records)
7. Hidden Traps After Naturalization: Taiwan Asset Inheritance
7.1 Taiwan Real Estate Inheritance Becomes Much More Complicated
Real case: Mr. D naturalized as Japanese in 2018 and gave up Taiwanese nationality. In 2024, his father passed away and left a property in Xinyi District, Taipei.
Problems:
Inheriting as a "foreigner" must proceed under Taiwan's Act Governing the Choice of Law in Civil Matters Involving Foreign Elements
Household registration office, land office, and tax office all require the "foreign heir" process
Document notarization, title transfer, and tax handling added NT$500,000 in agency fees
Estate tax calculated as a foreigner (under Article 1, Paragraph 2 of the Estate and Gift Tax Act, foreigners are taxed only on estate located in Taiwan, but exemptions differ)
Lesson: Taiwan asset planning must be completed before naturalization (transfers, trusts, gift allocation). This is one of Dr. G.'s iron rules in consulting.
7.2 The Reality of Military Service Issues
Taiwanese men aged 18-36: if they have not yet served and have not completed naturalization, they must still handle military service obligations
After naturalizing as Japanese and losing Republic of China nationality, military service obligations disappear
But this is not a "benefit of naturalization". The vast majority of Taiwanese men can handle deferment or exemption through routes such as "residing in Taiwan for fewer than 365 days," "holding proof of enrollment at a foreign school," or "dual nationality"
Naturalizing for the sake of "avoiding military service" = exchanging a lifetime nationality for 1-2 years of military service = strongly opposed by consultants
7.3 The Real Gap in Health Insurance and Long-Term Care
Taiwan National Health Insurance cost: NT$1,000-3,000 per month
Medical care in Taiwan after loss of nationality: entirely self-paid (foreigners do not enjoy National Health Insurance)
If parents in Taiwan need medical visits or care from their children, entering as a foreigner for 90 days each time creates long-term inconvenience
Long-term care (after age 65): Japan's long-term care system (Long-Term Care Insurance) requires meeting residence requirements
8. Dr. G.'s Three Iron Rules
Iron Rule 1: Do Not Decide on Naturalization Before Age 35
Let students obtain PR first and live another five years before deciding. Naturalization is the single most important irreversible lifetime decision, and there is no time pressure. Deciding 5 or 10 years later works just as well.
Iron Rule 2: Ask These Three Questions
Before deciding on naturalization, the student must be able to answer "yes" to all three questions below:
Your parents are in Taiwan. Will you need to inherit real estate in the future? (inheritance procedures become far more complicated after naturalization) → You do not care?
Do you want your next generation to have full Japanese status? (children as Japanese nationals vs dual status) → You are willing for your children to become permanently Japanese?
Are you willing to face Taiwanese immigration with a Japanese passport for the rest of your life? → Can you accept this psychologically?
If all three are affirmative → naturalization. If you hesitate on any one question → PR is the endpoint.
Iron Rule 3: Three Must-Dos After PR
Hire a Japanese tax accountant (annual fee ¥100,000-200,000): handle cross-border income reporting and avoid the 2024-06 PR revocation trap
Enroll in National Pension: whether during a work visa gap or self-employment period, go to the ward office the same day to switch
Return to Japan once per year: PR expires if you leave Japan for more than 1 year without re-entry permission; it expires if you leave for more than 5 years even with re-entry permission
9. Typical PR Timeline for a Taiwanese IT Engineer
Example: Student Chang: NTU EE → Kyoto University Graduate School of Informatics master's → Tokyo Electron
Month
Event
Status
2026-04
Enters Kyoto University master's program
Student
2028-03
Completes master's + applies for HSP-1 (80 points)
HSP-1 (5 years)
2029-03
Completes 1 year on HSP-1 + maintains 80 points → applies for PR
HSP-1
2029-09
PR issued (1-year fast track)
PR holder
2029-2036
Works, pays taxes, pays social insurance, avoids violations
PR
2036-04
Reaches 10 years in Japan → naturalization decision point (5 years as PR holder + 3 years of work)
PR
Dr. G.'s actual conversation in 2036:
Consultant: "You are 35 now. Your PR has been stable for seven years. Do you want to naturalize? Three questions—" >Client: "My parents are in their 60s, and the house is in Xinyi District, Taipei. Future inheritance is important." >Consultant: "Then the answer is already clear. PR is the endpoint."
10. Real Failed Cases: Three You Must Remember
Case 1: Difficulty Inheriting Taiwan Real Estate After Naturalization
Background: Mr. D naturalized as Japanese in 2018 and gave up Taiwanese nationality.
Problem: In 2024, his father passed away and left a property in Taipei. Inheriting as a "foreigner" required using the Act Governing the Choice of Law in Civil Matters Involving Foreign Elements. Document notarization, title transfer, and tax handling added NT$500,000 in agency fees, and estate tax was calculated as a foreigner.
Lesson: Taiwan asset planning must be completed before naturalization.
Case 2: Tax and Insurance Trap During a Job Gap After Obtaining PR
Background: Mr. B obtained PR in 2023 and changed jobs from NEC to a foreign company in 2024, with a three-month gap.
Problem: He forgot to switch to National Pension + National Health Insurance, resulting in a three-month coverage gap.
Result: The issue was flagged during PR renewal in 2025, and his PR was almost revoked (ultimately passed after back payment + letter of reflection).
Lesson: PR is not "valid for life once obtained." During any job gap, you must go to the ward office the same day to switch coverage.
Case 3: Regret After Naturalizing for "Convenience"
Background: Mr. E naturalized as Japanese in 2019 (at age 35), mainly because "all my Japanese colleagues did it."
Problem: When his mother passed away in 2024, he realized he was already Japanese. He had to enter Taiwan for the funeral with a Japanese passport, and the household registration office notified him: "For your mother's estate, you are a foreign heir." The whole process dragged on for 18 months and added NT$800,000 in agency fees.
Mr. E's words: "If I could do it again, I would choose PR. The 'administrative convenience' of naturalization was nowhere near worth the psychological cost of losing Taiwanese nationality."
Lesson: If the motivation for naturalization is merely "convenience," 95% will regret it.
11. Common Q&A
Q1: Can I restore Taiwanese nationality after naturalization? A: In theory, you can apply for restoration of nationality (Nationality Act Article 15), but it requires 1-3 years of residence in Taiwan, Ministry of the Interior review, and there are multiple rejected cases. 95% will not pass.
Q2: After obtaining PR, can I enter Japan with my Taiwan passport? A: Yes. PR holders still return to Japan with their Taiwan passport and can enter with their residence card attached (no visa required).
Q3: Can a PR holder work abroad for two years and then return to Japan? A: No. PR expires if you leave Japan for more than 1 year without re-entry permission; it expires if you leave for more than 5 years even with re-entry permission. Long-term absence from Japan = loss of PR.
Q4: After naturalization, do my children automatically become Japanese? A: Yes. When naturalization takes effect, unmarried minor children (under 18) automatically acquire Japanese nationality. Adult children must apply separately.
Q5: Can I "get PR first, then naturalize later"? A: Yes. Dr. G. recommends this path: obtain PR first, spend five years slowly evaluating whether naturalization is necessary, and apply only if you answer yes to all three questions. The years of residence as a PR holder before naturalization also count toward the naturalization requirements.
Q6: Is there an interview for naturalization? A: Yes. Legal Affairs Bureau interview + home visit + workplace investigation + neighbor interviews. At N1 level, the interview should be low pressure; below N3, there is a high chance of needing to reapply.
Conclusion: PR Is the Ceiling; Naturalization Is a Surrender
After 15 years guiding 80+ Taiwanese students in Japan from study abroad to PR, my final insight is this: PR is the real ceiling for Taiwanese international students.
PR = two passports, two identities, benefits on both sides, and children can choose dual status from age 18 until age 22.
Naturalization = giving up the Republic of China passport, losing Taiwan National Health Insurance, greatly complicating inheritance, and making children permanently Japanese.
For 95% of Taiwanese families, the "benefits" of naturalization (voting rights + strong passport) are nowhere near worth the "costs" (loss of nationality + inheritance traps + psychological identity rupture).
Dr. G.'s standard advice to every Taiwanese student approaching the PR stage:
PR is the endpoint. Unless all three major questions are answered affirmatively, stop here
The first thing after PR: hire a Japanese tax accountant, enroll in National Pension, and ensure cross-border income is properly reported
After maintaining PR for 5 years + after age 35: only then begin evaluating whether naturalization is necessary
18 months before naturalization: complete Taiwan asset planning and transfers for real estate, stocks, insurance policies, and other assets
Before deciding on naturalization: have a complete conversation with your spouse, children, and parents in Taiwan to avoid family rupture
