Japan Naturalization Process in 2025｜Step-by-Step Guide for Foreign Residents in Osaka

Complete Guide to the Naturalization Process in Japan – Expanded and Detailed Version

This article is also available in Japanese: Click here for the Japanese version

by Gyoseishoshi Ishinagi Office

⏱ Estimated Timeframe: 9 to 18 Months

Naturalization in Japan is a long and detailed process that typically takes between 9 months to 1.5 years from start to finish. The actual time varies depending on your individual situation, including residency history, family circumstances, and financial stability.

Since the required documentation is extensive and often involves foreign-language materials and careful history tracing, working with an administrative scrivener (gyoseishoshi) is highly recommended to ensure an accurate and efficient application.

---

🧾 What to Bring to the Initial Consultation

To make the first consultation efficient, please prepare the following items:

• Passport (including expired ones if available)
• Residence card (zairyu card)
• Certificate of residence (juminhyo) showing all household members and relationships
• Tax documents: latest tax certificates or withholding slips
• Employment contract or certificate of employment
• Any documents already obtained from your home country
• Personal seal (inkan), if available

These documents help the scrivener confirm your eligibility and build a roadmap for your application.

---

💼 What an Administrative Scrivener Can Do for You

While naturalization applications can technically be submitted by the applicant alone, professional support makes a significant difference. Services typically include:

• Checking eligibility (e.g., length of residence, income level, conduct, and criminal records)
• Creating a tailored checklist of required documents based on your circumstances
• Translating foreign-language documents, including certified translations where required
• Writing assistance for resumes and personal motivation letters based on interviews
• Drafting and formatting official forms and supporting documentation in Japanese
• Step-by-step guidance on collecting both Japanese and foreign documents
• Communication with consulates, embassies, and local government offices if needed
• Accompanying the applicant to Legal Affairs Bureau interviews, when requested
• Reviewing the entire application to ensure consistency and avoid contradictions
• Advising on the timing of application steps in relation to residency status and visa renewals
• Coordinating other procedures such as financial support documentation and employer confirmations

An experienced gyoseishoshi acts as both a translator and legal process navigator, reducing delays and increasing the chance of successful approval. While naturalization applications can technically be submitted by the applicant alone, professional support makes a significant difference. Services typically include:

• Checking eligibility (e.g., length of residence, income level, conduct, and criminal records)
• Creating a tailored checklist of required documents based on your circumstances
• Translating foreign-language documents (with translator certification if needed)
• Writing assistance for resumes and personal motivation letters based on interviews
• Step-by-step guidance on collecting both Japanese and foreign documents
• Communication with consulates, embassies, and local offices if needed
• Scheduling and attending interviews at the Legal Affairs Bureau if requested
• Coordinating other procedures: visa renewal, financial support proof, etc.

---

📑 Key Documents Required and How to Obtain Them

To successfully apply for naturalization in Japan, you’ll need to collect a variety of documents from both Japanese and foreign institutions. The table below outlines common documents, where to obtain them, estimated processing time, appointment requirements, and whether a gyoseishoshi (administrative scrivener) can obtain them on your behalf:

Document Type	Issuing Authority	Processing Time	Appointment Required	Can Gyoseishoshi Obtain?
Certificate of Residence (Juminhyo)	Local Ward Office	1 day	No	Yes
Full Family Register (Koseki Tohon)	Municipal Office (for Japanese spouse/child)	1 day	No	Yes
Tax Payment Certificate	Tax Office or Ward Office	1–3 days	Sometimes	Yes
Income Certificate	Tax Office or Ward Office	1–3 days	Sometimes	Yes
Withholding Slip (Gensenchoshuhyo)	Employer	Few days	No	No
Certificate of Employment	Employer	Few days	No	No
Employment Contract	Employer	Immediate	No	No
Bank Balance Statement	Bank	Same day	Sometimes	No
Marriage/Birth Certificates (Japan)	Ward Office	1 day	No	Yes
Foreign Birth/Birth Certificates	Embassy or Consulate	Varies	Yes	Depends on Country
Translation of Foreign Documents	Self or Translator	Few days	No	Yes (if authorized)
Naturalization Application Forms	Legal Affairs Bureau	Provided during interview	N/A	No

Note:

• UK: Administrative scriveners cannot obtain birth or marriage certificates. The applicant or a family member must request them directly.
• China: Administrative scriveners cannot obtain personal documents. Official requests must come from the applicant, typically via notarized documents.
• Korea: Despite some online claims, most Korean consulates in Japan require in-person application or notarized power of attorney for document requests.

For each country, procedures differ. Please consult with your scrivener early, especially if you need to coordinate overseas document collection or translation. Some documents (e.g. family registries, tax records) expire after 3–6 months, so timing is critical.

A personalized checklist with deadlines and responsibilities will be provided at the start of support services. Here is a sample list of documents you may need for your naturalization application:

Document Type	Issuing Authority	Days Required	Requires Appointment	Can Gyoseishoshi Obtain?
Certificate of Residence (Juminhyo)	Local Ward Office	1 day	No	Yes
Tax Payment Certificates	Tax Office or Ward Office	1-3 days	Sometimes	Yes
Withholding Slip (Gensenchoshuhyo)	Employer	Varies	No	No
Employment Certificate	Employer	Few days	No	No
Marriage Certificate (Japan)	Ward Office	1 day	No	Yes
Foreign Birth/Marriage Certificates	Consulate or Embassy	Varies	Yes	Depends on Country
Translation of Foreign Documents	Self or Translator	Few days	No	Yes (by translator)

For example, in the UK, a gyoseishoshi cannot obtain documents directly; only the applicant or an authorized person abroad can. In Korea, although some websites suggest gyoseishoshi support is possible, in practice most consulates require in-person applications or notarized powers of attorney.

---

🛂 What Happens If Your Residency Expires During the Application?

Even while your naturalization application is under review, you must renew your current visa/status of residence as normal. This is because you remain a foreign national until permission is granted. If your status lapses, you may face overstaying issues, potentially invalidating your application.

If you are planning to switch to an internship or other new role during the application period, it’s best to consult in advance to avoid contradictions in your work status and immigration records.

---

📘 Procedures After Naturalization Approval

Once your naturalization is approved, these steps are required:

• Submit a Naturalization Notification to your city or ward office to create your new family registry (koseki)
• Update your residence certificate and MyNumber information
• Notify institutions of your status change: health insurance, pension, banks, mobile carriers
• Return your residence card and (if applicable) foreign passport

These are important to finalize your transition to Japanese nationality and prevent discrepancies across institutions.

▶︎ See our complete guide to naturalization in Japan｜Ishinagi Immigration Legal Office (Osaka)

---

▼ Popular Articles on Naturalization in Japan

• Thinking About Naturalization in Japan? Start Here with a Practical Guide
• Complete Guide to Required Documents and Translation Tips for Naturalization in Japan
• 7 Common Reasons for Naturalization Denial in Japan

Please contact us using the inquiry form below.

If you are in a hurry, feel free to call us at
06-7777-3467　
(9:00 AM – 11:00 PM, Monday to Friday)

Please note that we may be unable to answer immediately if we are assisting other clients.
In that case, kindly leave a voicemail, and we will call you back as soon as possible.

About Our Privacy Policy

To learn about the privacy policy of “Ishinagi Administrative Scrivener Office,”
please refer to the link below:

---