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.

Find out whether the care you need 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 generally excludes people granted immigration permission to stay for three months or less. But it allows an exception for certain residence statuses, including Dependent, if documents show that the person is expected to remain in Japan for more than three months. Ask the ward what documents it will accept in your case. Shinjuku also excludes people whose “Designated Activities” permission allows them to stay for medical treatment or for tourism and recreation.

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. Ask the insurer to explain in writing which parts of the policy cover your care. A general statement that emergencies are covered may leave those questions unanswered.

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 a clinic early and ask how to send the medical information it needs. Ask whether it can assess your condition, what records to bring and how appointments work. A clinic in Japan may not prescribe the same medicine or give you the quantity you need, even if you have a foreign prescription.

Keep a short medical summary with your medicine names and strengths, how much you take and when, any allergies, and your clinician's contact details. 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. Even if the hospital appears on your insurer's list, it may not be able to bill the insurer directly for every appointment or treatment.

If you must pay and claim later, ask the facility for an estimate and accepted payment methods. Make sure you can pay that amount using a method the clinic accepts.

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.

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 whether the insurer will extend your cover, pay for continuing treatment or medical transport, and how soon you need to tell it that you cannot leave as planned. Save the insurer’s answer with the policy so you can find the conditions later.

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.

Where to find medical help

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. Before going to the clinic or hospital, confirm that it can treat someone your age with your condition 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 the phone number of someone who can help in one accessible folder.