Japan has universal insurance and excellent clinical care. The one thing you have to understand as a gay man is the line the system draws between treatment and prevention. Treating a diagnosed illness is insured and cheap. Preventing one — PrEP, PEP, doxyPEP — is not insured at all, and you pay full private prices. That single divide explains nearly every cost surprise in these guides.
🏥 Who Gets Care, and On What Terms
The system runs on compulsory health insurance. Two routes in:
- National Health Insurance (国民健康保険, Kokumin Kenkō Hoken) — for the self-employed, students, and anyone not on an employer scheme.
- Employees' Health Insurance (健康保険, Kenkō Hoken) — through your employer.
Anyone with a residence status of three months or more must enrol and is entitled to. Once you're in, you pay 30% of the cost of covered treatment and the insurer covers the rest. A monthly High-Cost Medical Expense cap limits what you pay when bills run high — which matters a lot for HIV treatment.
Tourists and short-term visitors are outside the insurance system. You can still be treated, but you pay 100% of the price, and there's no reciprocal arrangement that lets a foreign public health card cover you here. Travel insurance is the practical safety net.
You don't need a referral to see a doctor — walk straight into a clinic (診療所, shinryōjo) for routine care. Large hospitals may add a surcharge (often ¥5,000–7,000) if you turn up without a referral letter, so a small clinic is the right first stop for sexual health.
💴 The Self-Pay Divide (自由診療)
Here's the rule that catches people out. Insurance covers treating a diagnosed condition. It does not cover prevention, or, usually, screening when you have no symptoms.
| Service | Insured (you pay 30%)? | Reality |
|---|---|---|
| Treating a diagnosed STI (symptoms present) | ✅ Yes | Cheap. Bring your insurance card. |
| Asymptomatic STI screening at a clinic | ❌ Usually no | Self-pay (自由診療, jiyū shinryō) — full price. |
| PrEP | ❌ No | Self-pay, even though the drug is approved. |
| PEP | ❌ No | Self-pay — ≈¥280,000 for the course. |
| DoxyPEP | ❌ No | Self-pay, off-label. |
| HIV treatment (ART) | ✅ Yes | 30%, then cut further with the disability certificate. |
| Free HIV/syphilis test at a hokenjo | Free | Outside insurance entirely — anonymous and free. |
This is why the free hokenjo network matters so much: it's the one free channel for the screening insurance won't touch.
📋 Registering as a New Resident
Moving here:
- Register your address at your city or ward office (市役所/区役所) within 14 days of arriving, with your residence card (在留カード).
- Enrol in National Health Insurance at the same office if you're not on an employer scheme. You'll get an insurance card (保険証) to bring to every clinic visit.
- If you're HIV-positive, get your care into the AIDS Core Hospital network early — the HIV Positive guide below walks it through.
Keep your insurance card and residence card on you. Clinics ask for the insurance card at every insured visit. For self-pay prevention (PrEP/PEP) you won't use it, but photo ID may still be asked for.
🚪 The One Principle to Remember
Match the service to the door. Anything preventive, or an anonymous check → the free hokenjo or a self-pay private clinic; don't expect insurance to apply. Anything you're being treated for → an insured clinic or hospital, card in hand. HIV care has its own door: the AIDS Core Hospital network. Send yourself to the wrong track and you either overpay or get turned away.
Related: