Preface to the 10th Edition ⅰ
Preface to the First Edition (Excerpt) ⅱ
Before entering ⅶ

Chapter 1 Smooth Progress of the Contract
Section 1 Valid Establishment of a Contract 1
[1] Precedents/[2] Establishment of a sales contract/[3] Agreement of intent/[4] Preparation of a document/[5] Disadvantages in the absence of a document/[6] Deposit/[7] Legal contract and simple promise/[8] Binding force of a contract/[9] Expression of intent and legal act/[10] Method of concluding a contract - agency/[11] Corporate system
Section 2 Effect of the Contract 18
[12] Effect of sales contract/[13] Network of contracts/[14] Practical awareness of contractual relationships/[15] Principle of freedom of contract/[16] Respect for freedom of contract and its external order/[17] Bilateral contracts/[18] Classification and definition in law/[19] Right of defense against simultaneous performance/[20] Right of defense/[21] Performance and performance/[22] Provision of performance/[23] Cross-section of law
Section 3 Monetary Claims 36
[24] Monetary claims/[25] Characteristics of money/[26] Place of payment/[27] General rules and specific rules/[28] General rules and specific rules on claims/[29] Payment and payment of purchase price/[30] Application/[31] Optional provisions/[32] Set-off/[33] Requirements for set-off/[34] Legal requirements and legal effects/[35] Understanding legal requirements - positive and negative requirements/[36] Principles and exceptions/[37] Assignment of claims/ [38] Reasons for restrictions on assignment of claims/[39] Validity requirements for assignment of claims/[40] Requirements for counter-argument/[41] Necessity of public notice/[42] Double assignment of claims/[43] Status of debtor in assignment of claims/[44] Statute of limitations/[45] Reason for existence of the statute of limitations system/[46] Period of statute of limitations and interruption of statute of limitations/[47] Statute of limitations The effect of completion

Chapter 2 Ownership
Section 1 Transfer of Ownership and Transfer of Possession 73
[48] ​​Obligations of real estate sellers/[49] Real estate - land and buildings/[50] Registry and registration/[51] Basic principles of real estate registration/[52] Specific obligations of sellers regarding registration/[53] Possession/[54] Possession as a legal requirement/[55] Types of possession/[56] Delivery
Section 2 Changes and Effects of Property Rights 86
[57] From the perspective of ownership acquired by the purchaser/[58] Remedies for infringement of rights/[59] The status of creditors - From the perspective of liability property/[60] Protection in disposal and succession/[61] Scenes where real rights and claims intersect/[62] Real rights as control and claims as claims/[63] Real rights stipulated in the principle of legality of real rights and civil law/[64] Principle of public notice in real rights transactions/[65] Requirements for transfer of ownership based on a sales contract/[66] Acts of claims and real rights - acts of obligation and acts of disposal/[67] Elements of real rights acts/[68] Relationship between acts of claims and real rights acts/[69] Unregistered transfer of real rights/[70] '... caution' or '... principle'/[71] Real rights claims/[72] Unjust enrichment/[73] General torts/[74] User liability
Section 3: Relationships involving the use of others' property 126
[75] In case there is a tenant living in the property for sale/[76] Usufruct and debenture-like use rights/[77] Lease rights/[78] The opposing power of real estate lease rights/[79] Special protection for housing lease rights/[80] Return of deposits, etc./[81] Special protection for lease rights of commercial buildings such as stores and offices/[82] Adjustment of use rights and security rights/[83] Right to request increase or decrease in rent/[84] Observation of reality and civil law/[85] Seller's responsibility/[86] Interpretation of the law

Chapter 3 Invalidity of Contract
Section 1. Failures in the Contract Formation Process 151
[87] Overview of reasons for failure in the process of forming a contract/[88] Formation of a contract/[89] “Mistakes in representation do not cause harm”/[90] Incompetence/[91] Capacity for restricted acts/[92] Cancellation of a contract/[93] Effect of cancellation/[94] Confirmation of cancellation/[95] Confirmation of an immovable legal relationship - supreme power/[96] Virtue of a lawyer/[97] Roman law/[98] False representation/[99] “Nullity cannot be asserted against a third party in good faith”/[100] Inability to assert/ [101] Good faith? Malice/[102] Burden of proof for an intentional matter/[103] Third party/[104] Precedents/[105] The meaning of studying precedents and precedents/[106] Formal aspects of Supreme Court decisions/[107] Restrictions on appeals/[108] Review of Supreme Court decisions - Fact finding Error/[109] Review of Supreme Court decisions - fulfillment of the requirements for counterclaims/[110] Understanding Supreme Court decisions and recognition of precedents/[111] Judgments and precedents/[112] Recognition and interpretation of precedents/[113] Perspectives on reading precedents/[114] Legal texts/[115] Sources of decisions/[116] Expression of non-true intent/[117] Abuse of agency/[118] Analogical interpretation/[119] Mistake/[120] Specification of legal requirements/[121] Types of 'significant mistakes'/[122] Fraud? Coercion
Section 2 Reasons for Failure Regarding the Contents of the Contract 220
[123] Failure due to the contents of the contract/[124] Sanctions for acts contrary to the prohibition of law/[125] Mandatory provisions and optional provisions/[126] Specific examples/[127] Majority and minority opinions/[128] Antisocial contracts/[129] Types of violations of social order/[130] Restrictions on restoration to original state - illegal payment/[131] Conflict of claims/[132] Profiteering/[133] Causes of certain legal requirements/[134] Contracts aimed at providing originally impossible services

Chapter 4 Default
Section 1. Various Types of Default 249
[135] Default / [136] Default and Breach of Contract / [137] Types of Default / [138] Impossibility of Performance / [139] Classification of Impossibility of Performance / [140] Release Effect of Impossibility of Performance without Fault / [141] Risk Assumption / [142] Delay in Performance / [143] Performance Period / [144] Liability for Delay / [145] Three Closed Types of Default? / [146] Other Types of Default - Refusal of Performance / [147] Incomplete Performance / [148] Breach of Ancillary Obligations / [149] Obligation to Provide Information as a Statutory Ancillary Obligation / [150] Fault / [151] Relativity of Legal Concepts
Section 2 Enforcement and Civil Litigation 276
[152] Enforced performance of debt/[153] Guarantee of enforced performance in principle/[154] Cases in which enforced performance cannot be requested/[155] Methods of enforced performance/[156] Prohibition of self-help in principle/[157] Law of claims and enforcement law/[158] Civil procedure/[159] Fact finding and burden of proof/[160] Distribution of burden of proof/[161] Presumption and deeming/[162] Relaxation of proof/[163] Relaxation of proof or presumption of fact by legal provisions
Section 3 Damages 300
[164] Overview of Liability for Non-Performance of Obligations/[165] Claim for Damages/[166] Benefits of Performance and Benefits of Reliance, etc./[167] Compensatory Damages and Delay Damages/[168] Property Damages and Non-Pecuniary Damages/[169] Scope of Damages/[170] Stages of Accidents Determining the Scope of Damages/[171] Passive Damages in Personal Injury/[172] Punitive Damages/[173] Reduction of Proof in Calculating Damages/[174] Damages Due to Non-Performance of Monetary Obligations/[175] Limitations on Interest/[176] Double Sale of Real Estate/[177] “Can Be Done, But Must Not Be Done”
Section 4 Termination of Contract 328
[178] Termination of contract/[179] Right of formation/[180] Occurrence of right of termination/[181] Foreign theories/[182] Effect of termination/[183] ​​Restoration to original state/[184] Retroactive effect/[185] Retroactive effect of termination/[186] Limitation of retroactive effect/[187] Termination and damages/[188] Termination by agreement or termination contract
Section 5 Seller's Warranty Liability 343
[189] Seller's Warranty Liability / [190] Sale of Other's Rights / [191] Principle of Public Trust - Good Faith Acquisition / [192] Forfeiture Warranty Liability / [193] Legal Rules Not Directly Provided in the Civil Code / [194] Invalidity of Disposition by Right Holder and Disposition without Right / [195] Acquisitive Prescription / [196] Prescription for Acquisition by Possession of Real Estate Ownership / [197] Prescription for Acquisition by Register of Real Estate Ownership / [198] Defects and Inadequacies in Goods / [199] Seller's Warranty for Defects / [200] Damages as a Scope of Warranty for Defects / [201] Warranty for Defects and Liability for Non-Performance of Obligations / [202] Product Liability / [203] Claim for Complete Delivery of Goods in the Sale of Unspecified Goods / [204] Specific and Unspecified Goods / [205] Functional Relationship between Real Rights Law and the Law of Obligations

Chapter 5 Collateral for Bonds
Section 1 Preservation of Liability Property 379
[206] Means of securing satisfaction of claims/[207] Other systems with collateral functions/[208] Means of securing satisfaction of monetary claims/[209] Liability property/[210] Subrogation rights/[211] Exclusive use of subrogation rights/[212] “You may, but you must not”/[213] Right of rescission of creditors
Section 2: Personal Security 398
[214] Consumer loans/[215] General collateral/[216] Debt and liability/[217] The term liability/[218] Guarantee/[219] Written methods as a legal device for the protection of guarantors, etc./[220] Establishment and contents of guaranteed debt/[221] Obligation of creditor to provide information to guarantors/[222] Tasks of the law of counting and civil law/[223] Guarantee/[224] Regulations on continuous guarantee/[225] Principle of change in circumstances/[226] Subrogation against the principal debtor/[227] Various subrogation systems/[228] Joint and several guarantees/[229] Joint and several obligations
Section 3: Security Rights 428
[230] Collateral and transfer-type collateral/[231] Reasons for the coexistence of transfer-type collateral/[232] Lien/[233] Legal requirement of ‘regarding…’/[234] Limited real rights unknown to the owner/[235] Comparison of lien and simultaneous performance defense/[236] Pledge and mortgage/[237] Conflict of interest surrounding mortgage/[238] Collateral and bankruptcy or insolvency/[239] Establishment of mortgage/[240] Effect of mortgage/[241] Execution of mortgage/[242] User-specific agreement/[243] Priority payment right/[244] Movable mortgage? Mortgage
Section 4. Transfer of Rights Collateral 456
[245] Overview of transfer-type mortgages/[246] Provisional registration mortgages/[247] Sale with reservation of ownership/[248] General legal principles of transfer mortgages/[249] Act on Provisional Registration Mortgages, etc./[250] Contents of provisional registration mortgages/[251] Questions about the attitude of the law/[252] Interpretation and legislative theory/[253] Constitutional review and civil law/[254] Constitutional control over family law and inheritance law/[255] Constitutional considerations in the interpretation and operation of civil law

Chapter 6 Civil Law and Civil Law Studies
Section 1: What is Civil Law? 479
Ⅰ.
The significance of civil law/Ⅱ.
Civil law in its practical sense - the status of civil law in the legal system/Ⅲ.
Civil Law Courts/Ⅳ.
Civil Code/Ⅴ.
Basic principles of our civil law
Section 2: Studying Civil Law 499
Ⅰ.
Invitation to the Study of Law/Ⅱ.
On the 'method' of studying law in general/Ⅲ.
On the study of civil law/Ⅳ.
Sintering

Case Index 525
Index of facts and names 532

Preface to the 10th Edition

It's been two years since the 9th edition came out.
This time, we have comprehensively reviewed the content and expressions and made revisions and additions to ensure that we can be confident in our current position.
In the process, new laws and important precedents that emerged in the meantime were reflected.
And, new items were created and described for matters deemed necessary to understand the entire civil law.

I will be leaving the university in February 2023 by resigning from my position as Professor.
But of course, I didn't give up on studying law.
Although our society has overcome all kinds of trials and achieved industrialization and democratization, there are still countless important tasks that the law must fulfill in our society.
I hope that those who wish to become lawyers will learn civil law properly from the beginning of their legal studies.
This is not just about knowing what the civil law currently contains, but also about why it is so and how it came to be so, and understanding it for yourself.

I sincerely hope that those who study law will faithfully and sincerely study the basics of law to deepen their understanding of the law.

October 20, 2025
Yang Chang-su

Before entering

1.
Before reading this book, you must prepare the law code.
And if there is a passage in the text that points out a provision of the Civil Code or other laws, you should open the law book, find that part, and read it carefully.
At first, the meaning may not be immediately apparent.
However, the habit of looking into the law code, and furthermore, the habit of organizing one's thoughts in light of the law, is very important (there is nothing more desirable than having good study habits).
It is better to have the latest law code.
When you first begin studying law, there is no need to have a large law book such as the "Great Law Code" or the "Six Law Code."


2.
As is the case with most law textbooks, this book also contains many instructions to 'refer' to things that will come later or have already been mentioned before.
This instruction must be carried out.
Again, it must be done.
When reading a law textbook, including this book, you should not be obsessed with the number of pages you have read.

3.
Throughout this book, you will encounter many unfamiliar terms that are not commonly used in everyday life.
If you find it unbearable that new terms are introduced so frequently, it would be best to stop studying law in the first place.
As with all professional fields, law uses a lot of its own terminology.
The term is, so to speak, a common communication code used among those specializing in law, not much different from the numbers or various symbols used in mathematics, computer programming, or symbolic logic.
This is something that must be understood and learned with great effort so that it becomes ingrained in one's body.
Of course, there are many areas where our country's legal language needs improvement, but if you find the law so unsatisfactory that you can't stand it, then it can only be said that studying law is not suitable for you.

4.
As you can see from reading the above, at this stage, it is necessary to know Chinese characters well to study the law.
This is unavoidable because the Constitution, Civil Code, Criminal Code, and other major laws use Chinese characters.

However, in this book, we have made it a rule not to use Chinese characters.
And for legal terms that need to be known in Chinese characters, we decided to display them in Chinese characters, but we did so to a minimum.
However, it should always be noted that many more Chinese characters, and many more difficult ones, are used in law.

5.
Due to the nature of this book, I did not cite all the relevant literature.
There are parts that simply say, “Look at the textbook” or “Follow the explanation in the textbook.”
Our country's civil law textbooks are usually published in five sections: General Provisions of Civil Law, Real Rights Law, General Theory of Obligations, Specific Theory of Obligations, and Inheritance by Family Members. Therefore, I have indicated which of these is the subject.
So, you can look up the issue in question in the index attached to the book.
The current civil law textbook can be any author's.