Japan Myna Hokensho 2026: The Real Transition Story for Foreign Residents

Information current as of April 2026 based on the MHLW Myna Hokensho central page, MHLW 資格確認書 guidance, MHLW insurance qualification confirmation methods, Digital Agency English page on 資格確認書, and the Myna card abroad/lost procedures.

The December 2025 transition was supposed to be the end of a long migration: out with the old paper health insurance cards, in with the Myna card — with a 資格確認書 safety net for people who couldn't or didn't want to use Myna. Four months in, the reality is messier. Adoption sits in the low-to-mid 60s percent range, card readers still break, name mismatches plague foreign-resident records, and many hospitals are quietly still accepting expired paper cards through a temporary extension that runs until July 31, 2026. This guide explains how the system actually works right now, what to do at the reception desk when things go wrong, and the foreign-specific issues that don't appear in official guides.

The three documents you might have

Post-transition, any given foreign resident carries one (or more) of these:

Document	What it does	Who has it
マイナ保険証	Myna card with insurance registration completed	About 64.6% of insured residents as of Jan 2026
資格確認書 (Qualification Confirmation Certificate)	Paper fallback, functions like the old insurance card	Auto-issued to everyone without a registered Myna card, valid up to 5 years
資格情報のお知らせ (Qualification Information Notice)	Paper notice showing your insurer, 記号/番号 — needed when card readers fail or for non-medical procedures	Issued to Myna insurance users; keep it with the card

If your current set is only "expired paper card from before Dec 2025" — that card stops working after July 31, 2026 (when the extended transition period ends). Before then, get the fallback 資格確認書 from your insurer.

How to register your Myna card as an insurance card

You can register in three places:

1. Myna Portal app or website (mynaportal.go.jp) — log in with Myna card + PIN. Takes about 5 minutes.
2. Any face-recognition card reader (顔認証付きカードリーダー) at hospitals, clinics, or pharmacies — register on the spot during your next visit. The machine will guide you through a PIN or face-recognition step.
3. Seven Bank ATMs — select "マイナンバーカード利用" at the ATM menu and follow the prompts.

Registration is permanent unless you explicitly cancel. Once done, your Myna card is recognized across all insurers — including after you change jobs, move cities, or switch between SHI and NHI.

資格確認書 — the fallback that most people have

If you have not registered your Myna card as an insurance card, your insurer mails you a 資格確認書 automatically. There is no application, no fee, no waiting list. The certificate is a physical paper document that functions exactly like the old insurance card at the reception desk.

Key facts

• Validity: Up to 5 years, set by each insurer (some use 1 year, some 5)
• Auto-issuance: To everyone who does not have a Myna card, or who has one but has not registered it for insurance use, or whose registration lapsed due to Myna card expiry
• Application required only for special cases: elderly or disabled residents who need accommodations, or Myna card holders whose card is lost or being renewed
• Renewal: Automatic — new certificate arrives before the current one expires

For foreign nationals who find the Myna registration process confusing, the 資格確認書 is a perfectly valid permanent option. Using the 資格確認書 is not a second-class experience — the same 7:3 co-payment split applies and you access the same care.

資格情報のお知らせ — the paper you must not lose

If you did register your Myna card for insurance, your insurer mailed you a separate document called the 資格情報のお知らせ. This shows your insurer name, 記号 (symbol), 番号 (number), and other identifying data. Keep it — and bring it to hospital visits alongside your Myna card.

Why:

• When a hospital's card reader breaks or the network is down, reception staff use the 記号・番号 from this paper to look up your record manually
• Government procedures unrelated to hospital visits (家族の国保脱退手続, 医療証申請, 介護認定, 保険給付申請) still require the 記号・番号
• MHLW issued renewed guidance in November 2025 after many patients showed up with only the 資格情報のお知らせ — that document alone is not valid for clinical visits; it must pair with the Myna card

A screenshot on your phone is not a valid substitute — it must be the paper original or a printed copy from Myna Portal.

What happens at hospital reception when things go wrong

Even four months after the transition, common problems at the reception desk include:

The card reader fails or the network is down

Reception staff take your Myna card and 資格情報のお知らせ, then run online 資格確認 manually from the back-office terminal. This takes 2–5 minutes. You receive normal 7:3 billing.

You haven't registered your Myna card yet

If you only have the Myna card without insurance registration, you will likely be asked to pay 10 割 (full price) upfront. Later, submit receipts to your insurer for 7 割 reimbursement via 療養費支給申請. This can also be avoided by bringing your 資格確認書 — carry it separately until registration is complete.

Your insurance status hasn't updated yet after a job change

When you change employers or move from SHI to NHI, your Myna card automatically reflects the new insurer — but only after your new insurer submits the 資格取得届. This typically takes 5 business days. During that window, your Myna card appears "unqualified" to reception. The current workaround: through July 31, 2026, hospitals can accept your Myna card plus your old (expired) paper card or 資格情報のお知らせ, and perform online 資格確認 to bridge the gap. After that date, this workaround ends.

Your 子ども医療費受給者証 (child medical subsidy) does not link to Myna

The Digital Agency's PMH (Public Medical Hub) platform is rolling out through FY2026. In participating municipalities (松山市, 姫路市, and expanding), Myna card alone covers both insurance and child subsidy. In most municipalities still, the paper 受給者証 remains required alongside the Myna card.

Your name on the card doesn't match hospital records

This is the most common foreign-specific problem. Your 在留カード shows your name in ローマ字. Your Myna card takes this ローマ字 form. But many hospitals historically registered you under a 通称名 or a spelled-out katakana version. When the card reader returns your name, the reception system cannot match it to your existing patient record. You will be asked to confirm personally — and you may be registered as a new patient, losing access to past medical history at that clinic.

Fix: before your next visit, ask the hospital's front desk to update your record to match your 在留カード name exactly.

Losing your Myna card or traveling abroad

Lost or stolen

Call the Myna Number Comprehensive Freedial: 0120-95-0178 — 24 hours a day. From abroad: +81-3-6734-0170. The line suspends your card's digital certificate immediately. Report the physical card loss to your local 警察 within a few days — you need the 遺失届受理番号 to reissue the card at your city hall. Reissuance typically takes 1 month; during that window, request a temporary 資格確認書 from your insurer.

Traveling abroad — foreign nationals

Here is an important asymmetry: since May 2024, Japanese nationals who submit 国外転出届 can apply for continued use of their Myna card abroad. Foreign nationals cannot. When you submit 国外転出届, your Myna card is invalidated at your planned departure date. When you return to Japan and register a new 住民票, you must re-apply for a Myna card.

If your travel is short (not accompanied by 国外転出届), your Myna card remains valid throughout the trip.

Medical care while abroad

Myna 保険証 does not work at foreign hospitals. Pay in full locally, keep all receipts and diagnostic documentation, and file a 海外療養費 claim with your insurer within 2 years after return. This process is unchanged from the pre-Myna era.

Foreign-specific issues not covered in the official guides

在留カード number and Myna number are different

The 12-digit Myna number does not change when your 在留期間 is renewed and your 在留カード番号 changes. The two numbers are separately tracked. There is ongoing work to unify them under a single 一体化カード (law passed, implementation in progress — no firm date as of April 2026). Until then, make sure both numbers are up to date on your records.

Name mismatches from 通称名 or 漢字表記 requests

If you have registered a 通称名 (commonly used name) or a 漢字氏名表記 (available for nationals of China, Korea, and other kanji-culture countries via ISA kanji name application), your Myna card can display either form. But the insurance record linked to the card uses whichever name was on your 在留カード at time of enrollment. Picking up a new Myna card with 漢字表記 while your hospital records still reference your ローマ字 name guarantees a mismatch. Before updating, tell your hospital.

Myna card expiry = 在留期間 expiry

For foreign nationals, the Myna card's validity equals your 在留期間 expiration date. When you renew your 在留期間, you must also renew the Myna card at your city hall — do not wait until it's needed at the hospital. Without a valid Myna card, your insurance registration suspends.

Address change — the 14-day rule still applies

Within 14 days of a move, update your 住民票 and update the 券面記載 on your Myna card at the municipal office. Until the update, 資格確認 may show your old address, causing discrepancies at new hospitals.

The transition safety net — what expires in July 2026

MHLW extended the post-December 2025 grace period to July 31, 2026. During this window, hospitals can accept:

• Expired paper 健康保険証
• Myna card plus old 資格情報のお知らせ (when reader fails)
• 資格確認書 (continuously — not dependent on the grace period)

After August 1, 2026, the paper-card fallback ends completely. At that point, every patient must present either a functioning Myna 保険証 registration OR a valid 資格確認書. Foreign residents who have not dealt with this yet have until end of July 2026 to get a 資格確認書 mailed or register their Myna card.

Adoption statistics: what the data says

From MHLW's latest published figures:

• December 2025 Myna usage: 63.24% (driven by the paper-card expiry deadline)
• Adoption continued trending above 63% into early 2026 per MHLW monthly releases
• Sharply lower among elderly cohorts — oldest-old groups remain heavily on 資格確認書
• Significant regional gaps between highest- and lowest-adoption prefectures

The 資格確認書 fallback is not a temporary bandage for slow adopters — it is a permanent parallel system. You are not under pressure to "get on Myna" if the 資格確認書 works for you.

A decision framework for foreigners

1. Have a Myna card and comfortable with digital procedures? → Register via Myna Portal or at your next hospital visit. Keep the 資格情報のお知らせ paper.
2. Have a Myna card but prefer a paper backup? → Register for Myna insurance AND request a 資格確認書 (available on application).
3. Don't have a Myna card / don't want to register? → Your 資格確認書 comes automatically. Use it like the old paper card.
4. Your insurance status just changed (new job, quit job, moved city)? → Wait 5 business days, then verify your new 資格情報のお知らせ has arrived. Until then, use the old paper + Myna card combo at hospitals (valid until July 31, 2026).
5. Planning to leave Japan permanently? → Cancel 住民票 at the city office; Myna card invalidates at departure. Re-apply when/if you return.

The bottom line

The Myna 保険証 transition is not "everyone must use Myna now." It is "paper cards from old insurers are gone, replaced by either a digital-Myna path or a paper-証明書 path — your choice." For foreign residents with complex name situations, frequent job changes, or plans to travel abroad long-term, the 資格確認書 route often works better with fewer system-mismatch headaches. For residents confident with digital systems and staying put, Myna 保険証 saves a reissuance cycle every 5 years.

Either way, the July 31, 2026 grace period ends this summer. If you're still using a pre-transition paper 保険証, take one of the two paths above before August.

For the full health insurance picture: Health Insurance in Japan: 5 Mistakes That Cost Foreigners. For the 2027 unpaid-premium visa rule: Unpaid insurance premiums and your 2027 visa renewal.