Same-Day Medical Certificates in Japan: When It's Possible and When It Isn't
A same-day medical certificate (診断書, shindansho) is often possible in Japan, including on a first visit, but only when the doctor who examines you that day can already reach a diagnosis. When the diagnosis is not clear yet, or the document you need is an official benefit form rather than a simple note, the paperwork takes longer. For what a shindansho is and how to request one, see our medical certificate guide; this article is about timing.
Can you get a shindansho on the day you are examined?
Yes, when the examination that day supports a diagnosis. Two rules in Japan's Medical Practitioners' Act shape the timing:
- A doctor may not issue a medical certificate without personally examining you (Article 20), so the document can only come from a doctor who has seen you.
- A doctor who has examined you must not refuse a requested certificate without legitimate grounds (Article 19).
In practice, a same-day certificate is realistic when the clinical picture is already clear at the end of the consultation: for example, adjustment disorder with an identifiable workplace stressor. A clinic can then write a short certificate stating the diagnosis and a recommended rest period during or shortly after the visit.
The law obliges issuance, but it sets no deadline. "Same day" is common practice for simple certificates, not a legal entitlement, and clinics differ in how they handle paperwork.
When is a same-day certificate not realistic?
When the doctor cannot yet state a diagnosis in writing. A shindansho is a formal medical document, and a doctor who signs one is certifying its contents. Same-day issuance tends not to happen when:
- The diagnosis needs observation over more than one visit, such as distinguishing a temporary stress reaction from a depressive illness. The certificate then comes at the follow-up instead.
- The requested content goes beyond the findings. A certificate reflects what the doctor diagnosed, not the wording an employer asks for.
- The request concerns a period before any examination. Certification is tied to examination, so documenting an illness the doctor never saw is limited.
None of this means the request failed. In many cases the certificate simply comes at a later visit.
Does the type of document change the timeline?
Yes; official benefit forms take longer than a simple certificate for your employer. "Medical certificate" covers documents on different tracks:
- A private certificate for your employer has no format set by law, although some employers ask for their own form. This is the certificate covered above. If the goal is sick leave, our guide to mental health leave in Japan explains how the certificate fits into the leave (休職, kyushoku) process.
- The sickness allowance (傷病手当金, shobyo teatekin) claim form is not a shindansho: the doctor's section certifies a period in which you were unable to work under their care, so it follows treatment over time rather than being produced at a first visit. The Japan Health Insurance Association (協会けんぽ, Kyokai Kenpo) explains that the insured person, the employer, and the attending doctor each complete their own section; our guide to the sickness allowance covers the steps.
- The Jiritsu Shien Iryo (自立支援医療, subsidized psychiatric care) application uses a designated diagnosis form, set by the prefecture or designated city that runs the program and submitted to your city or ward office; see our Jiritsu Shien Iryo guide.
If you need one of the official forms, confirm with the clinic how long that specific document takes rather than assuming the same-day pattern applies.
What should you do if the doctor says "not today"?
Find out which of these three reasons applies, because each has a different next step:
- The diagnosis is not established yet. The doctor can tell you what they need to see and when you should return; a concrete revisit date means delayed, not refused.
- The document is a designated form. Confirm the expected preparation time and whether anything from your employer or city office is needed first.
- The requested wording does not match the findings. Confirm what the doctor can state; a narrower certificate the doctor can sign is more useful than a broader one they cannot.
If you have not been seen anywhere yet, book the earliest appointment you can and raise the certificate at the start of the consultation, not the end, so the doctor examines you with the document in mind. What to bring and how the visit runs is covered in your first visit to a psychiatrist in Japan.
Frequently asked questions
This article is general information, not medical advice for your individual situation. If you need a certificate, the starting point is an examination with a doctor.
Medically reviewed by our psychiatrist (M.D.). Updated October 16, 2026.