Medical Clinic Regulation: Korea's "1 Doctor = 1 Clinic" vs Japan's Medical Corporation System

In 2024, a Korean dentist was caught secretly operating 120+ dental clinics through proxy owners (dentists who lent their names only). One person controlled all management, revenue, and operations while the clinics pushed overtreatment and mass patient processing. Result: 3 years in prison.

This isn't just a crime story — it reveals structural differences in how Korea and Japan regulate medical practice.

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Korea: "1 Doctor = 1 Clinic" Rule

Korean medical law's core regulation (Medical Service Act, Art. 33-8): one medical entity can only open one clinic. Korea does have a medical corporation system, but even corporations are limited to one clinic only. Individual or corporate — the "one entity, one clinic" rule is absolute.

Why this rule exists

• Prevent medical commercialization: Chain expansion leads to profit-driven care

• Patient safety: Doctors must personally treat and take responsibility

• Curb overtreatment: Prevent unnecessary procedures driven by revenue targets

Reality: Workarounds are rampant

• Proxy ownership: Using other doctors' names while controlling operations. The 120-clinic case is exactly this

• Franchise-style clinics: Same brand, legally independent directors, but HQ controls management

• Network hospitals: Independent on paper, but one group manages marketing, HR, and revenue

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Japan: Multiple Clinics via Medical Corporations

Japan takes a different approach.

• Individual doctors: 1 clinic (same as Korea)

• Medical corporations (医療法人): Can legally operate multiple clinics

This is the biggest difference. Korea also has medical corporations, but they're limited to one clinic only. A Japanese medical corporation running 3 clinics in Tokyo and 2 in Osaka is completely legal.

But not a free-for-all

Restriction	Detail
Non-profit principle	No profit distribution allowed
Dividend ban	Cannot pay shareholders/investors
Dissolution assets	Go to government/other medical corps, not individuals
Government oversight	Prefectural governor approval and supervision
Required medical director	Each clinic must have a managing physician

Key: "Chain expansion for profit" is structurally blocked. Multiple clinics allowed, but you can't extract personal profit.

Proxy ownership — also illegal in Japan

Japan also clearly prohibits proxy ownership (名義貸し). Operating without a real managing physician = administrative action + criminal penalties.

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Side-by-Side Comparison

Factor	Korea	Japan
Individual doctor	1 clinic only	1 clinic only
Corporate multiple	Not allowed	Allowed (medical corporation)
Profit motive	Restricted	Non-profit principle
Proxy ownership	Illegal	Illegal
Chain operation	Effectively banned	Conditionally allowed
Philosophy	Block at source	Allow + control via non-profit rules

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Real-World Problems — Neither System is Perfect

Korea: Strong regulation drives sophisticated workarounds. Network dental chains, marketing companies controlling clinics, beauty clinics with puppet directors.

Japan: Legal corporate chains in cosmetic medicine (美容医療) are booming — factory-style care, high-pressure sales counseling, mass-processing patients. Consumer complaints surging in 2023-2024. Since it's "legally operated," harder to crack down than Korea's illegal proxy schemes.

The 120-clinic case asks: "Does strict regulation prevent abuse, or just make it more sophisticated?"