Healthcare on a 90-day Tokyo stay: travel insurance vs NHI

Before a 90-day Tokyo stay, check which health coverage applies to you and how you would use it. Your booking length alone doesn't decide eligibility for Japan's public insurance, and a travel-insurance certificate doesn't necessarily mean a clinic can bill the insurer directly.

The useful preparation is to resolve three separate questions: whether the care is covered, who pays on the day, and how long the cover continues if your plans change. Keep the answers with the policy so you aren't trying to interpret it while unwell.

Check eligibility using your actual status

国民健康保険 (kokumin kenkō hoken, National Health Insurance) is administered locally. If you may be eligible, contact the ward office with your immigration documents and any workplace-insurance information. Don't decide from “90 days” or the apartment contract alone.

Shinjuku's eligibility explanation sets out conditions and exclusions rather than a simple rule based on having stayed a certain number of days. For example, it says people whose period of stay is three months or less are generally excluded, but lists an exception for certain statuses, including Dependent, when documents establish that the person will stay in Japan for more than three months. The page calls for objective evidence; ask the ward what documents it will accept in your case. It also excludes people whose “Designated Activities” permission allows them to stay for medical treatment or for tourism and recreation. A long permission period therefore doesn't cancel every exclusion.

If you are travelling on digital nomad status, follow the official visa insurance requirements and ask about your status specifically. A six-month visa does not, by itself, tell you whether you qualify for public health insurance.

Tell the insurer about ongoing care before travel

List regular medicines, ongoing conditions, planned treatment and anything awaiting investigation. Ask what the policy covers in each case, including a flare-up of an existing condition. Get a written answer tied to the policy wording, rather than relying on a general statement that emergencies are covered.

Ask whether routine prescriptions, monitoring tests, mental-health care, dental treatment or pregnancy-related care are covered if relevant to you. Find out what you must pay yourself and which treatment needs the insurer's approval in advance.

The maximum benefit applies only to covered care. If the policy excludes your regular monitoring visits, you'll need to budget for them or find cover that includes them.

Don't buy a second policy assuming it automatically fills the first one's gaps. Ask both insurers how other insurance affects claims and whether the missing care is actually covered.

Arrange medication before the supply runs low

Talk to your prescriber before departure about the quantity needed and a plan if the trip extends. Check Japan's medication import procedures for each ingredient and quantity; some require paperwork separate from a prescription.

If you will need care in Tokyo, contact an appropriate clinic early and send the information it requests through its approved channel. Ask whether it can assess your condition, what records to bring and how appointments work. Don't assume a foreign prescription guarantees the same medicine or a particular supply length in Japan.

Keep a short medical summary with medicine names, strengths, dosing instructions, allergies and your clinician's contact. The generic ingredient name is useful when the brand used at home is unfamiliar.

Establish who pays on the day

Ask the insurer whether it can arrange direct billing with the clinic or hospital you intend to use, and what must happen before the visit. Then confirm with the facility. An insurer listing a hospital doesn't guarantee every appointment or treatment can be billed directly.

If you must pay and claim later, ask the facility for an estimate and accepted payment methods. Keep a workable payment method and sufficient available funds for that arrangement.

For a worked example, suppose a covered visit costs ¥20,000 and your policy requires you to pay the first ¥5,000. If the remaining ¥15,000 is reimbursed only after the claim, you still need the full ¥20,000 at the visit. That distinction between eventual cost and money needed now matters even when the claim succeeds.

The clinic visit guide covers reception, payment and the papers to request before leaving. Ask your insurer in advance whether it needs originals, translations, an itemised statement or a medical report, and ask the clinic about any document fee.

Check the end date and any hospital-stay limits

Read what happens if illness prevents your planned departure or treatment continues past the policy's end date. Ask about extension, continuing treatment, medical transport and the process for notifying the insurer. Some answers depend on the policy and the event; keep the conditions beside the benefit amount.

A policy may limit both the amount it pays and the number of treatment days it covers. A cheaper hospital won't extend a limit on covered days. Check both limits, including whether treatment can continue beyond your planned departure.

If your stay changes, arrange any permitted policy extension before the existing cover ends. Don't assume you can buy cover after symptoms begin or that new insurance will cover a condition already being treated.

Save a route to appropriate care

Tokyo's HIMAWARI medical information service helps people find medical institutions with language support and understand the system. Its foreign-language line is 03-5285-8181, available daily from 9 a.m. to 8 p.m. Check with the facility before travelling, including whether it can see your condition and age group that day.

For an emergency requiring an ambulance, use 119. Don't delay urgent help to obtain an insurance estimate. Save your full address, building name and room number where you can read them quickly.

Keep the insurer's assistance number, policy details, medical summary and a contact who can help in one accessible folder.