---
title: "日本 医療法人 — medical corporation types, the non-profit constraint, and tax treatment"
aliases:
  - "non-profit/japan-iryou-houjin"
  - "japan-iryou-houjin"
  - "医療法人"
  - "いりょうほうじん"
  - "iryou houjin"
  - "japan medical corporation"
  - "社会医療法人"
  - "持分なし医療法人"
domain: non-profit
slug: japan-iryou-houjin
created: 2026-06-05
last_updated: 2026-07-30
last_tended: 2026-07-30
review_by: 2027-06-05
confidence: likely
tags: [non-profit, japan, healthcare, iryou-houjin, governance, tax]
status: active
sources:
  - "https://laws.e-gov.go.jp/law/323AC0000000205"
  - "https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kenkou_iryou/iryou/igyou/"
  - "https://www.nta.go.jp/taxes/shiraberu/taxanswer/hojin/5275.htm"
  - "https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kenkou_iryou/iryou/shaikairyou/"
---

# 日本 医療法人 — medical corporation types, the non-profit constraint, and tax treatment

## Wiki route

This entry sits under [[non-profit/INDEX|non-profit INDEX]] as the **healthcare-specific** legal person under the **医療法 (Medical Care Act)** — a *non-profit-by-statute* form that nonetheless can have ownership-like 持分, which makes it a partial peer to, not a member of, the 一般法人法 family in [[non-profit/japan-koeki-vs-general-zaidan-comparison|公益財団 vs 一般財団 vs 一般社団 vs NPO法人 comparison]]. Its upper "社会医療法人" tier reaches the donor-deduction / corporation-tax posture of the certified non-profits in [[non-profit/japan-nintei-npo-houjin-tax-benefits|Japan 認定NPO法人 tax benefits]]. It is supervised by 都道府県 / MHLW, not by [[financial-regulators/fsa|the FSA]] — see the supervisory map at [[financial-regulators/INDEX|financial-regulators INDEX]].

## TL;DR

A **医療法人 (Medical Corporation)** is the corporate vehicle a doctor or group uses to run a **病院 / 診療所 / 介護老人保健施設**, authorised by the **都道府県知事** under the 医療法. It is **non-profit by statute — surplus may not be distributed as dividends** — but historically came in a **持分あり (equity-type)** flavour where members held a residual claim on net assets. Post-2007 reform, **new medical corporations are 持分なし (no-equity)**, and a top tier — the **社会医療法人** — performs public-mission care (emergency, remote, perinatal) in exchange for full **公益法人等** tax treatment.

## Two structural axes: 社団 vs 財団, and 持分あり vs 持分なし

The following table is scoped to public primary sources (laws.e-gov.go.jp, mhlw.go.jp, nta.go.jp). It restates licence / structure / product boundaries from those materials and does not invent market share, ranking, or unstated numerical claims. ^[source:laws.e-gov.go.jp; mhlw.go.jp; nta.go.jp]

| Axis | Variants | Notes |
|---|---|---|
| Membership basis | **社団医療法人** / **財団医療法人** | Most are 社団; the 財団 variant is endowment-based, like a 一般財団 |
| Equity (出資持分) | **持分あり** (legacy) / **持分なし** (current default) | The **2007 医療法 reform** barred *new* 持分あり corporations |

The **持分 (equity stake)** question is the defining tension of the form. A 持分あり 社団医療法人 cannot pay dividends, but on withdrawal or dissolution a member could historically recover a share of accumulated net assets — an exit-value that behaves economically like equity. The 2007 reform closed this for new entities and the state has since run **認定医療法人 transition incentives** to convert legacy 持分あり corporations to 持分なし (relieving the 出資持分 inheritance/gift-tax trap on succession).

## The non-profit constraint (and why it is not a 公益法人)

- **No profit distribution** — a 医療法人 may **not** pay dividends to members (医療法 §54). Surplus is retained.
- **But not automatically tax-favoured** — an ordinary 医療法人 is generally taxed as a **普通法人 (ordinary corporation)** on its medical income, *not* under the broad 公益法人等 exemption. The non-profit *conduct* rule (no dividends) and the *tax* status are separate questions — a crucial contrast with 公益財団 / 社会福祉法人, which get exemption on their core mission.

This is the key boundary case: a 医療法人 is "non-profit" in **governance** (no dividends) yet "for-profit-taxed" in **default tax treatment** — unless it climbs to the 社会医療法人 tier.

## 社会医療法人 — the public-mission upper tier

The **社会医療法人** is a 都道府県-認定 upgrade for medical corporations carrying out **救急医療・へき地医療・周産期医療** and similar公益性-high services to a statutory standard:

| Lever | Ordinary 医療法人 | 社会医療法人 |
|---|---|---|
| Corporation tax on medical income | **Taxed (普通法人 treatment)** | **Non-taxable** on the public医療 business (公益法人等 treatment); 収益事業 taxed |
| Bond issuance | No | May issue **社会医療法人債 (public-mission medical bonds)** |
| Permitted附帯業務 | Narrower | Broader (incl. certain収益業務 to cross-subsidise the mission) |
| Distribution | Prohibited | Prohibited (residual on dissolution goes to state/local body/other 社会医療法人) |

So the **社会医療法人** is where the medical form finally reaches the tax posture of the other public-interest non-profits — and gains a capital-markets tool (社会医療法人債) unavailable to a 公益財団.

## Governance organs

| Organ | 社団医療法人 | 財団医療法人 |
|---|---|---|
| 社員総会 | Required (members) | N/A |
| 評議員会 | — | Required |
| 理事会 / 理事 | 理事 3+ (理事長 = usually a 医師/歯科医師) | 理事 3+ |
| 監事 | 1+ | 1+ |

The 理事長 must generally be a licensed 医師 or 歯科医師 — a sector-specific governance constraint absent from the general non-profit forms.

## How it differs from the other non-profit forms

- **vs 社会福祉法人** — both are sector-licensed regulated-service non-profits, but the welfare form gets 公益法人等 tax on its core service from the start, whereas an ordinary 医療法人 is普通法人-taxed unless it reaches 社会医療法人.
- **vs 公益財団** — a 公益財団 grants/funds; a 医療法人 *operates* clinical services and can (uniquely) carry residual 出資持分 in legacy form.
- **vs NPO法人** — an NPO cannot run a 病院 as its core; clinical care needs the 医療法 vehicle.
- The 財団医療法人 variant shares the endowment-governance logic of [[non-profit/japan-general-foundation-establishment-requirements|一般財団法人]], but under the 医療法 not the 一般法人法.

## Strategic reading

- The 持分あり → 持分なし migration (and the 認定医療法人 succession-tax relief) is the live policy story: the state is steadily **draining equity-like value out of the medical-corporation form** to make it a cleaner non-profit, removing the 出資持分 inheritance/gift-tax succession trap.
- The 社会医療法人 tier is the **only path to genuine tax exemption** for a medical operator — and it comes bundled with the 社会医療法人債 financing tool, a notable bridge between the non-profit and capital-markets worlds.
- For any "non-profit hospital" question, separate the two layers: **distribution rule** (always non-profit) vs **tax status** (普通法人 by default, 公益法人等 only at the 社会医療法人 tier) — exactly the kind of governance-vs-tax split the cross-form comparison stresses in [[non-profit/japan-koeki-vs-general-zaidan-comparison|the comparison page]].

## Related

- [[non-profit/INDEX|non-profit INDEX]]
- [[non-profit/japan-koeki-vs-general-zaidan-comparison|公益財団 vs 一般財団 vs 一般社団 vs NPO法人 comparison]]
- [[non-profit/japan-shakai-fukushi-houjin|Japan 社会福祉法人]]
- [[non-profit/japan-nintei-npo-houjin-tax-benefits|Japan 認定NPO法人 tax benefits]]
- [[financial-regulators/INDEX|financial-regulators INDEX]]
- [[INDEX|FinWiki index]]

## Sources

- e-Gov 法令検索 — 医療法: https://laws.e-gov.go.jp/law/323AC0000000205
- 厚生労働省 — 医療法人制度: https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kenkou_iryou/iryou/igyou/
- 国税庁 No.5275 — 公益法人等課税: https://www.nta.go.jp/taxes/shiraberu/taxanswer/hojin/5275.htm
- 厚生労働省 — 社会医療法人: https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kenkou_iryou/iryou/shaikairyou/

> [!info] 校核状態
> confidence: likely. The 医療法 form, the 社団/財団 and 持分あり/持分なし axes, the 2007-reform bar on new 持分あり corporations, the 普通法人-by-default tax posture, and the 社会医療法人 tier (incl. 社会医療法人債) are public and stable. The 認定医療法人 succession-relief programme has had time-limited windows; treat its current availability and terms as something to confirm against the latest MHLW/NTA notice.