Voluntary National Pension for Japanese Citizens Living Abroad

When you move abroad and file the overseas moving-out notification (Kaigai Tenshutsu-todoke 海外転出届), compulsory National Pension (Kokumin Nenkin 国民年金) coverage ends, but a Japanese citizen aged 20 to under 65 can stay in the system by choice (Nin’i Kanyu 任意加入).¹² The decision also determines whether the Disability and Survivor Basic Pensions protect you and your family while you live abroad.¹² Coverage starts only from the day you apply and cannot be backdated, so decide before you leave.¹

This guide covers filing, payment, the safety net, Fuka Nenkin, iDeCo and the cost-benefit arithmetic, with figures as of October 2026.

Overview & Eligibility Framework

Legal Basis: Why Japanese Citizens Retain the Right to Enroll from Abroad

Compulsory coverage is tied to living in Japan. Article 7(1) of the National Pension Act (Kokumin Nenkin Ho 国民年金法) makes people domiciled in Japan aged 20 to under 60 compulsory Category 1 insured persons, and that status ends on the day after you stop having a domicile in Japan.¹ Article 7 is the compulsory rule, not the source of the overseas right.

The overseas right sits in Supplementary Provisions Art. 5(1)(iii) (附則第5条第1項第3号). It lets “a person with Japanese nationality or other person specified by Cabinet Order”, not domiciled in Japan and aged 20 to under 65, become an insured person by applying, notwithstanding Article 7(1).¹ Japan Pension Service (JPS, 日本年金機構) puts it simply: if you hold Japanese nationality, you can enroll voluntarily after moving abroad.²

Three conditions apply in practice. You must hold Japanese nationality (with one treaty exception covered below), be aged 20 to under 65, and not already be a Category 2 or Category 3 insured person.¹ A Japanese employee posted abroad (Chuzai 駐在) who stays on Employees’ Pension (Kosei Nenkin 厚生年金) is Category 2 and already covered, so this route is not for them; an accompanying dependent spouse may instead qualify as Category 3.¹

Status is acquired on the day of application, and insured months are counted from the month of acquisition.¹ There is no retroactive enrollment.¹³

Voluntary enrollees cannot use the relief available to compulsory members. Premium exemption, payment deferral and the student special payment system are all switched off for voluntary enrollees by Supplementary Provisions Art. 5(10).¹⁴ If your income abroad drops, the only choices are to keep paying or stop.

Your voluntary status ends automatically on any of these events:¹

Reaching age 65.
Becoming covered by Employees’ Pension.
Having a withdrawal request accepted.
Reaching 480 contribution months.
Acquiring a domicile in Japan again.
Ceasing to hold Japanese nationality (or the Cabinet Order status that qualified you).
Becoming a dependent spouse while under 60 (check whether Category 3 applies instead).
Falling into arrears and then letting 2 years pass with no premium paid.

The 65 to 70 Special Voluntary Enrollment Route

A special route lets some people keep paying after 65. Under the special voluntary enrollment (Tokurei Nin’i Kanyu 特例任意加入), a Japanese national abroad aged 65 to under 70 who has not yet earned an old-age pension entitlement can continue.¹³ Three parallel provisions cover different birth cohorts, each with an item for Japanese nationals not domiciled in Japan.¹⁵

Birth date	Statutory provision	Available to overseas Japanese nationals
On or before 1 April 1955	1994 Act (Law No. 95), Supplementary Provisions Art. 11¹	Yes
2 April 1955 to 1 April 1965	2004 Act (Law No. 104), Supplementary Provisions Art. 23¹	Yes
2 April 1965 to 1 April 1975	2025 Act (Law No. 74), Supplementary Provisions Art. 40, in force 20 June 2025⁵	Yes

The cut-off is now birth on or before 1 April 1975, following the 2025 Pension Reform Act.⁴⁵ Older summaries that stop at 1965 are out of date.

If you are already an overseas voluntary enrollee in these cohorts, reaching 65 without an entitlement means you are deemed to have applied, and coverage continues automatically.¹⁵ The special status ends when you gain the entitlement, reach 70, join Employees’ Pension, ask to leave, or fall into arrears and then make no payment for 2 years.¹

What Happens If You Do Nothing: Kara-kikan Explained

If you do not enroll, your years abroad are not simply lost. From April 1986, months in which you could have enrolled voluntarily as a Japanese national abroad, aged 20 to under 60, count as “aggregate periods” (Gassan Taisho Kikan 合算対象期間, commonly called Kara-kikan カラ期間).¹ For April 1961 to March 1986, a separate provision treats periods abroad while holding Japanese nationality, aged 20 to under 60, the same way.¹

Kara-kikan counts toward eligibility but adds nothing to the amount. It helps you reach the 10-year qualifying period for an old-age pension, but JPS states plainly that it is “not reflected in the pension amount”.⁴ JPS also notes that proving such periods may require supporting documents.⁴

The bigger gap is protection. Disability and Survivor Basic Pensions require you to be an insured person on the key date, and an unenrolled resident abroad is not one.¹ The table below summarises the difference.

Item	Enrolled voluntarily	Not enrolled (Kara-kikan)
Counts toward 10-year qualifying period	Yes¹	Yes¹⁴
Increases Old-age Basic Pension amount	Yes, by about ¥1,765 a year per month paid (as of October 2026)⁴	No⁴
Disability Basic Pension if first examined while abroad	Possible, subject to contribution tests¹⁶	No¹
Survivor Basic Pension if you die while abroad	Possible, subject to contribution tests¹	Only through the 25-year qualified route¹
Fuka Nenkin (additional pension)	Available¹²	No
iDeCo contributions	Available since May 2022⁷⁸	No⁷

Financial Breakdown: Monthly Premiums vs. Projected Old-Age Pension

The FY2026 National Pension premium is ¥17,920 a month (as of October 2026).⁴⁹ JPS has already published the FY2027 premium of ¥18,290 a month (as of October 2026).¹⁰ Each month’s premium is due by the end of the following month.⁹

Advance payment (Zennou 前納) lowers the total. The discount is largest for 2-year payment by direct debit (Koza Furikae 口座振替), and the FY2026 figures are below (as of October 2026).¹⁰

Method	2-year	1-year	6-month	Early debit (当月末振替)
Direct debit	¥417,150 (save ¥17,370)	¥210,530 (save ¥4,510)	¥106,300 (save ¥1,220)	¥17,860 (save ¥60)
Payment slip or credit card	¥418,510 (save ¥16,010)	¥211,220 (save ¥3,820)	¥106,650 (save ¥870)	Not available

The 2-year saving is measured against 12 months at ¥17,920 plus 12 months at ¥18,290, a total of ¥434,520.¹⁰ Advance payment of Fuka Nenkin by direct debit is also possible: ¥9,220 for 2 years, ¥4,700 for 1 year and ¥2,370 for 6 months (as of October 2026).¹⁰ The credit card row reflects JPS’s general table; whether card payment is open to overseas enrollees is covered under payment logistics below.

The full Old-age Basic Pension for FY2026 is ¥70,608 a month for people born on or after 2 April 1956, and ¥70,408 for those born on or before 1 April 1956, after a 1.9% revision (as of October 2026).¹¹ The annual full amount is ¥847,300 (as of October 2026).⁶ By statute it equals ¥780,900 multiplied by a revision rate, rounded to the nearest ¥100, and is pro-rated by paid months out of 480.¹

One extra month of premiums adds about ¥1,765 a year to your pension, according to JPS (FY2026, as of October 2026).⁴ At ¥17,920 a month, you recover that month’s premium after about 10.2 years of receipt from age 65, or around age 75, holding FY2026 values constant.⁴ This is illustrative arithmetic only.

These numbers move. Benefits and premiums are revised every year, benefit increases can be restrained by the macro-economic slide (Makuro Keizai Suraido マクロ経済スライド), and deferring your claim (Kurisage 繰下げ) or tax on benefits paid abroad changes the net result.¹

Critical Safety Net: Disability (Shogai) and Survivor (Izoku) Pension Coverage Abroad

JPS lists this protection as a core reason to enroll. Paying premiums while voluntarily enrolled abroad can make the Survivor and Disability Basic Pensions payable.²

Disability Basic Pension While Enrolled Overseas

The Disability Basic Pension (Shogai Kiso Nenkin 障害基礎年金) turns on the first-medical-exam date (Shoshinbi 初診日). Under Article 30(1), you must have been an insured person on that date, and your disability must reach grade 1 or 2 on the recognition date, normally 1 year and 6 months after the first exam.¹ A voluntary enrollee abroad is an insured person.¹

You must also pass a contribution test. The standard test requires paid plus exempt months to make up at least two-thirds of your insured months up to two months before the first-exam month.¹⁶

A special rule is easier to meet, and it has been extended. If your first exam falls before 1 April 2036, you are under 65, and you have no unpaid months in the 12 months ending two months before the first-exam month, the test is treated as met.¹⁶ Older sources that give a 2026 end date are out of date.

FY2026 amounts are significant (as of October 2026): grade 1 is ¥1,059,125 a year and grade 2 is ¥847,300 a year.⁶ A child supplement of ¥243,800 each is added for the first two children and ¥81,300 for each further child.⁶

Living abroad does not by itself suspend this pension. The full suspension for overseas residence applies only to disability pensions for conditions first examined before age 20 outside the system, not to the standard pension described here.⁶

Why Kara-kikan Does Not Protect You

If you were not enrolled on your first-exam date abroad, there is no Disability Basic Pension. An unenrolled Japanese national abroad is not an insured person under Article 30(1)(i).¹ The second limb, for former insured persons aged 60 to 64, applies only to people domiciled in Japan.¹

The same structure applies to survivor benefits, with one exception. If the deceased had at least 25 years of paid and exempt periods, counting Kara-kikan, the Survivor Basic Pension can be payable regardless of insured status at death.¹ Most people in their 20s to 40s will not yet meet that 25-year test.

Survivor Basic Pension for Families

The Survivor Basic Pension (Izoku Kiso Nenkin 遺族基礎年金) is payable when an insured person dies, subject to the two-thirds test or the same before-1-April-2036 special rule.¹ Eligible survivors are a spouse who has a child, or the child.¹ A “child” means under 18 at the end of the fiscal year, or under 20 with a grade 1 or 2 disability.¹

The 2025 reform also changes child-related suspension rules from April 2028.¹⁵ Those details sit with the survivor pension topic rather than here.

Two further Category 1 benefits reach voluntary enrollees. Supplementary Provisions Art. 5(9) treats voluntary periods as Category 1 periods for the death lump sum and the widow’s pension (Kafu Nenkin 寡婦年金).¹

The death lump sum (Shibo Ichijikin 死亡一時金) needs at least 36 paid Category 1 months. It ranges from ¥120,000 (36 to under 180 months) to ¥320,000 (420 months or more), plus ¥8,500 if Fuka premiums were paid for 3 years or more.¹ It is not payable if the deceased had already received an old-age or disability basic pension.¹

Fuka Nenkin: Adding ¥400 a Month for a Higher Pension

The additional pension (Fuka Nenkin 付加年金) lets Category 1 insured persons pay an extra ¥400 a month from the month they apply.¹ Voluntary enrollees are treated as Category 1 for this purpose, so you can add it from abroad.¹²

The benefit is ¥200 a year for each month of Fuka paid, added to your Old-age Basic Pension.¹ JPS points out that you recover the extra premiums after 2 years of receipt.⁴

Unlike the basic pension, Fuka Nenkin is a fixed amount and is not indexed.¹ Ten years of Fuka (120 months) cost ¥48,000 and add ¥24,000 a year for life, but that ¥24,000 does not rise with prices.

It cannot be combined with the National Pension Fund. Members of the National Pension Fund (Kokumin Nenkin Kikin 国民年金基金) are excluded from Fuka, and JPS states this directly.¹⁴

It also shares a ceiling with iDeCo. The iDeCo limit for Category 1 and voluntary enrollees is a combined ceiling with National Pension Fund or Fuka contributions, so a high iDeCo amount may leave no room for Fuka.⁴ The combined limit is ¥68,000 a month until November 2026 and ¥75,000 a month from 1 December 2026 (as of October 2026).⁸¹²¹³¹⁴

On return to Japan, Fuka does not carry over automatically. JPS states that anyone who used Fuka or direct debit while abroad and wants to keep them must request them again when completing the compulsory enrollment procedure.²

Step-by-Step Administrative Procedure & Timeline

Where to Apply: City Hall Before Departure vs. Pension Office by Mail from Abroad

The filing point depends on where you are and who can help you. JPS sets out four cases (page updated 1 July 2024):²

About to move abroad: the municipal office (city, ward, town or village hall) where you currently live.
Already abroad, with a domestic cooperator: the municipal office of your last address in Japan.
Already abroad, without a cooperator, having lived in Japan: the pension office (Nenkin Jimusho 年金事務所) covering your last address in Japan.
Never lived in Japan: Chiyoda Pension Office (千代田年金事務所).

flowchart TD
    A["Japanese national, age 20 to under 65, not on Kosei Nenkin"] --> B{"Still living in Japan?"}
    B -- "Yes, before departure" --> C["Municipal office of your current address"]
    B -- "No, already abroad" --> D{"Ever lived in Japan?"}
    D -- "No" --> E["Chiyoda Pension Office"]
    D -- "Yes" --> F{"Domestic cooperator in Japan?"}
    F -- "Yes" --> G["Municipal office of your last Japanese address"]
    F -- "No" --> H["Pension office for your last Japanese address, in person or by post"]

Pension offices accept filings in person or by post. Street-corner pension consultation centres (Machikado no Nenkin Sodan Center 街角の年金相談センター) cannot process this application.⁴

Do not plan on filing at an embassy or consulate. JPS lists only municipal offices and pension offices as filing points.²

The main form is the 国民年金被保険者関係届書（申出書） (Kokumin Nenkin Hihokensha Kankei Todokesho, application form).⁴² If you will pay by direct debit, JPS also lists the account transfer and refund account form.⁴

Bring or enclose these items:⁴

A document showing your Basic Pension Number, or your My Number (show the card in person; send copies by post).
Your bank passbook and bank seal, if you will pay by direct debit.
Your cooperator’s details, if you are using one.

Choosing and Registering a Domestic Cooperator (Kokunai Kyoryokusha)

A domestic cooperator (Kokunai Kyoryokusha 国内協力者) is, in JPS’s words, “a relative in Japan who handles procedures and pays premiums on your behalf”.² JPS describes the payment method as “a cooperator such as a relative in Japan pays in place of the insured person”.²

The cooperator is an administrative arrangement, not a statutory role. No definition appears in the Act, and JPS says only “relatives and others” (親族等) without setting rules for non-relatives.¹² If you have no relative in Japan, ask the pension office whether another person is acceptable.

Your cooperator’s address matters for your records. The Nenkin Teiki Bin (ねんきん定期便, the annual pension record statement) goes in principle to a domestic address, such as a family member’s.¹⁵ Overseas mailing is offered only to Employees’ Pension members and Category 3 spouses who have registered their country, so plan to receive it via your cooperator or use the electronic version.¹⁵

Agree on roles before you leave: who opens pension mail, who pays, and how you will hear about a missed payment. If your cooperator changes, tell the office handling your enrollment.

Payment Logistics: Japanese Bank Direct Debit, Cooperator Payment, and Card Options

JPS lists two payment methods for overseas enrollees: your cooperator pays for you, or premiums are debited from a savings account held in Japan.² Direct debit is not compulsory for overseas enrollees, unlike the domestic voluntary routes.¹³

Your Japanese bank account is the weak point of direct debit. Banks set their own rules for customers who become non-residents, and a closed or restricted account means failed debits and unpaid months. Check your bank’s policy before departure, as explained in the guide to retaining Japanese bank accounts and brokerages abroad.

Credit card payment exists for National Pension generally, but its availability for overseas enrollees is unconfirmed. JPS’s card page lets anyone paying premiums apply at a pension office with the 国民年金保険料クレジットカード納付（変更）申出書, in person or by post.¹⁶

Card payment starts from the month after processing, a non-insured cardholder other than a spouse needs a consent form, and arrears cannot be paid by card.¹⁶ JPS does not say whether overseas voluntary enrollees can use it, so ask the pension office.

Missed premiums can be paid late, but only for 2 years. The right to pay a month’s premium lapses 2 years after its deadline.¹ Arrears followed by 2 years with no payment at all also end your voluntary status.¹

Timeline Checklist

When	Action	Basis
T-3 months	Decide whether to enroll; ask a relative to act as cooperator; check whether your Japanese bank will keep your account open	Practical advice
T-1 month to departure	File the 申出書 at your municipal office alongside the Kaigai Tenshutsu-todoke; choose direct debit, Fuka and any Zennou	JPS filing matrix²; no backdating¹
Month of departure	Confirm your acquisition date so there is no gap between compulsory and voluntary status	Statute¹
Every month abroad	Confirm each premium is paid by the end of the following month (as of October 2026)	JPS⁹
Each year abroad	Have your cooperator forward the Nenkin Teiki Bin, or use the electronic version	JPS¹⁵
Within 2 years of any missed month	Pay the arrears before the right to pay lapses and before status is lost	Statute¹
On return to Japan	Register your address; compulsory status resumes even for a short stay; re-request Fuka and direct debit	JPS²; statute¹
Age 65 or 480 months	Voluntary status ends; check the 65 to 70 special route if you lack an entitlement	Statute¹⁵

iDeCo and National Pension Fund for Overseas Voluntary Enrollees

Since May 2022, overseas residents who enroll voluntarily can join iDeCo (個人型確定拠出年金, the individual defined contribution plan).⁷⁸ Before that change, people living abroad could not.⁷

Two groups are excluded: people who claimed their public pension early (before 65) and people who have already received an iDeCo old-age benefit.⁷ MHLW classes eligible people as “Category 4 participants” (第4号加入者): voluntary National Pension insured persons, at home aged 60 to 65 or abroad aged 20 to 65, whose paid months have not reached 480 (as of October 2026).¹³

Because iDeCo eligibility here depends on being a voluntary enrollee, letting your enrollment lapse also affects your ability to contribute. Confirm the effect with your iDeCo administrator if your pension status changes.

The contribution ceiling rises on 1 December 2026 from ¥68,000 to ¥75,000 a month, shared with National Pension Fund or Fuka contributions as described above. The new ceiling applies from the December 2026 contribution, debited in January 2027 (as of October 2026).⁸¹²¹³¹⁴

The National Pension Fund is also open to you. Overseas voluntary enrollees can join the regional fund of their former address or the occupational fund they belonged to.¹ Membership lasts until 65 or the loss of voluntary status, and you cannot withdraw voluntarily once you join.¹⁴

If you are already a member and are moving abroad, your membership ends on departure. You can keep the previous contribution terms if you continue voluntary enrollment and reapply within 3 months.¹⁴

Non-residents cannot deduct premiums from Japanese income tax. The social insurance premium deduction (Shakai Hokenryo Kojo 社会保険料控除) in Income Tax Act Art. 74 is for residents, and Art. 165 applies resident rules to non-residents excluding Articles 73 to 77.¹⁷ An NTA Q&A on premiums withheld during a non-resident period reaches the same result, and the iDeCo deduction (Art. 75) falls within the same excluded articles.¹⁷¹⁸

A relative in Japan who pays your premiums may or may not be able to deduct them. Article 74(1) allows a resident to deduct premiums they pay for a relative who shares their livelihood (Seikei wo Itsu ni suru 生計を一にする).¹⁷ Whether an adult child abroad meets that test is fact-dependent, and we found no NTA guidance on this case, so ask a Zeirishi or the tax office.¹⁸

The guide to Japan tax residency rules explains when you count as a non-resident.

Cost-Benefit Analysis: Voluntary Nenkin vs. Global Index Funds

This section is illustrative arithmetic, not investment advice. It holds the FY2026 premium (¥17,920) and full annual amount (¥847,300) constant, and ignores indexation, the macro-economic slide, tax and currency effects (as of October 2026).⁴¹¹⁶

Contribution horizon	Months	Total premiums	Annual benefit from those months (months/480 x ¥847,300)	Years of receipt to recover premiums	Fuka: paid / annual add-on / breakeven
20 years	240	¥4,300,800	About ¥423,650	About 10.2 (to about age 75)	¥96,000 / ¥48,000 / 2 years
30 years	360	¥6,451,200	About ¥635,475	About 10.2	¥144,000 / ¥72,000 / 2 years
40 years	480	¥8,601,600	¥847,300	About 10.2	¥192,000 / ¥96,000 / 2 years

The breakeven is about 10.2 years at every horizon because the benefit grows in a straight line with months paid.⁴ The Fuka column uses fixed amounts, since Fuka Nenkin is not indexed.¹

The next table is a hypothetical illustration only, not a forecast, a recommendation or investment advice. It assumes the same ¥17,920 is invested each month at a hypothetical 3% or 5% annual return, compounded monthly, with no fees, tax or currency effects. The “years” columns show how long the pot would pay the matching annual pension from the first table if it earned 0% after age 65.

Horizon (hypothetical)	Pot at hypothetical 3%	Years the pot pays the matching annual benefit (0% return in drawdown)	Pot at hypothetical 5%	Years, at hypothetical 5%
20 years	About ¥5.88M	About 13.9	About ¥7.37M	About 17.4
30 years	About ¥10.44M	About 16.4	About ¥14.91M	About 23.5
40 years	About ¥16.59M	About 19.6	About ¥27.35M	About 32.3

The 3% and 5% rates are assumptions chosen for illustration, not sourced expectations. Real returns can be lower, negative or higher, and no specific product is implied. Speak to a licensed financial adviser before making an investment or pension decision.

What an investment pot cannot replicate: a pension that is paid for life and revised each year, Disability and Survivor Basic Pension cover, and the death lump sum.¹ If you live well past the breakeven ages above, the pension keeps paying where a finite pot would run out.

What counts against enrolling: currency risk if you retire abroad, non-resident withholding on benefits paid overseas, the fact that premiums cannot be withdrawn, and policy risk. Fuka adds a fixed, unindexed amount.¹ Net returns also depend on how your benefits are taxed, which the guide to receiving a Japanese pension abroad covers.

Japanese Citizens vs. Foreign Residents: Critical Distinctions

The overseas route is nationality-based. Supplementary Provisions Art. 5(1)(iii) refers to persons “with Japanese nationality or other persons specified by Cabinet Order”, and status ends on ceasing to hold Japanese nationality.¹ A dual national who holds Japanese nationality satisfies the wording on its face; this guide offers no view on nationality law.¹

There is one treaty exception for German nationals. Under the Social Security Agreement Implementation Act Art. 8 and its Cabinet Order, German nationals (and refugees covered by the Japan-Germany agreement) ordinarily resident in Germany, aged 20 to under 65, with at least 60 paid months, are treated as eligible.¹⁹²⁰ Germany is the only designated agreement, and their periods abroad are not counted as Kara-kikan.¹⁹²⁰

Other foreign residents lose coverage when they deregister. The domestic voluntary route for ages 60 to 65 requires a domicile in Japan, so it ends on departure.¹³ Their main options are totalization under a social security agreement or the lump-sum withdrawal payment (Dattai Ichijikin 脱退一時金), each covered in its own guide.

Japanese nationals covered by a foreign scheme can, on the statute, still enroll. Nothing in Supplementary Provisions Art. 5 or the Social Security Agreement Implementation Act bars them; Art. 9 of that Act restricts voluntary enrollment only for people working in Japan under partner-country coverage.¹¹⁹ We found no explicit JPS wording on this point, so confirm with the pension office; the guide to bilateral social security agreements covers totalization, which does not turn foreign contributions into Japanese premium months.

Point	Japanese citizens abroad	Foreign residents leaving Japan
Overseas voluntary enrollment	Yes, aged 20 to under 65¹	No, except the Germany agreement case¹⁹²⁰
Overseas years if not enrolled	Kara-kikan for eligibility only¹	No Kara-kikan under the overseas rule¹
Posted abroad on Kosei Nenkin	Category 2; not eligible and not needed¹	Same rule if still covered by Employees’ Pension¹
Exit options	Enroll voluntarily or rely on Kara-kikan	Totalization or the lump-sum withdrawal payment

Common Pitfalls & Regulatory Compliance Risks

Applying after departure and assuming it backdates: coverage starts on the application day. Fix: file at your municipal office before you leave.¹²
Assuming Kara-kikan gives disability cover: it does not. Fix: enroll if the safety net matters to you.¹
Letting a Japanese bank account close: debits fail and arrears build. Fix: confirm your bank’s non-resident policy, or arrange cooperator payment.¹²
Missing the 2-year limits: unpaid months older than 2 years cannot be paid, and arrears followed by 2 years with no payment end your status. Fix: check payments regularly through your cooperator.¹
Not telling your cooperator about changes: the Nenkin Teiki Bin and notices go to a domestic address. Fix: keep their address and your contact details current.¹⁵
Forgetting compulsory status on return: even a short registered stay switches you to compulsory coverage, and Fuka and debit lapse. Fix: request them again at the new municipality.²
Expecting exemption or deferral in a low-income year: these are not available to voluntary enrollees. Fix: budget for the full premium or consider withdrawing.¹²
Joining the National Pension Fund while paying Fuka: the two are legally exclusive. Fix: choose one.¹
Marrying and becoming a dependent spouse under 60: voluntary status ends. Fix: check whether Category 3 applies.¹
Claiming a tax deduction as a non-resident: premiums for a non-resident period are not deductible. Fix: check your residency status first.¹⁷¹⁸

References & Official Sources

e-Gov Law Search, 国民年金法 (National Pension Act, Law No. 141 of 1959), current revision enforced 1 October 2026, incl. Arts. 7, 9, 11, 27, 30, 37, 43, 44, 49, 52-2, 52-4, 87-2, 102; Supplementary Provisions Arts. 5, 9; amendment supplementary provisions: 1985 Act (Law 34) Arts. 8, 20; 1994 Act (Law 95) Art. 11; 2004 Act (Law 104) Art. 23; 2025 Act (Law 74) Arts. 1, 40, https://laws.e-gov.go.jp/law/334AC0000000141 ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²² ↩²³ ↩²⁴ ↩²⁵ ↩²⁶ ↩²⁷ ↩²⁸ ↩²⁹ ↩³⁰ ↩³¹ ↩³² ↩³³ ↩³⁴ ↩³⁵ ↩³⁶ ↩³⁷ ↩³⁸ ↩³⁹ ↩⁴⁰ ↩⁴¹ ↩⁴² ↩⁴³ ↩⁴⁴ ↩⁴⁵ ↩⁴⁶ ↩⁴⁷ ↩⁴⁸ ↩⁴⁹ ↩⁵⁰ ↩⁵¹ ↩⁵² ↩⁵³ ↩⁵⁴ ↩⁵⁵ ↩⁵⁶ ↩⁵⁷ ↩⁵⁸ ↩⁵⁹ ↩⁶⁰ ↩⁶¹ ↩⁶² ↩⁶³ ↩⁶⁴ ↩⁶⁵ ↩⁶⁶ ↩⁶⁷ ↩⁶⁸ ↩⁶⁹ ↩⁷⁰ ↩⁷¹ ↩⁷² ↩⁷³ ↩⁷⁴ ↩⁷⁵ ↩⁷⁶ ↩⁷⁷
Japan Pension Service, 国民年金の任意加入の手続き（日本の年金制度への継続加入）, updated 1 July 2024, https://www.nenkin.go.jp/service/kokunen/kanyu/20140627-02.html ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰
Japan Pension Service, 任意加入制度, https://www.nenkin.go.jp/service/kokunen/kanyu/20140627-03.html ↩ ↩² ↩³ ↩⁴
Japan Pension Service, 老齢年金を受け取るための期間が足りない方へ（任意加入制度）special page, updated 1 April 2026, https://www.nenkin.go.jp/tokusetsu/voluntary_coverage.html ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹
e-Gov Law Search, 社会経済の変化を踏まえた年金制度の機能強化のための国民年金法等の一部を改正する等の法律 (Law No. 74 of 2025, promulgated 20 June 2025), Suppl. Arts. 1 and 40; text also reproduced in the amendment supplementary provisions of the e-Gov National Pension Act record, https://laws.e-gov.go.jp/law/507AC0000000074 ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶
Japan Pension Service, 障害年金ガイド令和8年度版 (LK03-2), 2026, https://www.nenkin.go.jp/service/pamphlet/kyufu.files/LK03-2.pdf ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸
MHLW, iDeCoに加入できる年齢の要件などが拡大されます (leaflet, as of January 2022), https://www.mhlw.go.jp/content/12500000/000884281.pdf ↩ ↩² ↩³ ↩⁴ ↩⁵
National Pension Fund Association (iDeCo official site), 制度改正について, 2026, https://www.ideco-koushiki.jp/library/2022kaisei/ ↩ ↩² ↩³ ↩⁴
Japan Pension Service, 国民年金保険料, https://www.nenkin.go.jp/service/kokunen/hokenryo/hokenryo.html ↩ ↩² ↩³
Japan Pension Service, 国民年金保険料の前納, FY2026 table, https://www.nenkin.go.jp/service/kokunen/hokenryo/zenno.html ↩ ↩² ↩³ ↩⁴
Japan Pension Service, 令和8年4月分からの年金額等について, April 2026, https://www.nenkin.go.jp/oshirase/taisetu/kojin/2026/202604/0401.html ↩ ↩²
National Pension Fund Association (iDeCo official site), iDeCoの拠出限度額の引き上げにあわせてiDeCo掛金額変更をご希望の方へ, August 2026, https://www.ideco-koushiki.jp/library/pdf/notice202612-02.pdf ↩ ↩²
MHLW, DC拠出限度額（令和8(2026)年12月～）, 2026, https://www.mhlw.go.jp/content/12500000/001597082.pdf ↩ ↩² ↩³
National Pension Fund Association (国民年金基金), 加入条件・資格, https://www.npfa.or.jp/system/condition.html ; 掛金上限額変更について, https://www.npfa.or.jp/kakekin/ ↩ ↩² ↩³ ↩⁴
Japan Pension Service, 海外にお住まいの方にお送りする「ねんきん定期便」, updated 1 April 2025, https://www.nenkin.go.jp/service/nenkinkiroku/torikumi/teikibin/kaigaiteikibin.html ↩ ↩² ↩³ ↩⁴
Japan Pension Service, クレジットカードでのお支払い, https://www.nenkin.go.jp/service/kokunen/hokenryo/creditcard.html ↩ ↩²
e-Gov Law Search, 所得税法 (Income Tax Act), Arts. 74 and 165, https://laws.e-gov.go.jp/law/340AC0000000033 ↩ ↩² ↩³ ↩⁴
National Tax Agency, No.1130 社会保険料控除 and 質疑応答「非居住者であった期間内の社会保険料、生命保険料」, https://www.nta.go.jp/taxes/shiraberu/taxanswer/shotoku/1130.htm ; https://www.nta.go.jp/law/shitsugi/gensen/03/12.htm ↩ ↩² ↩³
e-Gov Law Search, 社会保障協定の実施に伴う厚生年金保険法等の特例等に関する法律 (Law No. 104 of 2007), Arts. 8 and 9, revision enforced 1 October 2026, https://laws.e-gov.go.jp/law/419AC0000000104 ↩ ↩² ↩³ ↩⁴
e-Gov Law Search, 社会保障協定の実施に伴う厚生年金保険法等の特例等に関する政令 (Cabinet Order No. 347 of 2007), Arts. 15 to 18, 97, 98, 98-2, https://laws.e-gov.go.jp/law/419CO0000000347 ↩ ↩² ↩³