Yoon & Yang

South Korea



Yoon & Yang is a premier choice for all corporate and financial law areas, notably in the competition, technology and telecommunications, dispute resolution, employment and regulatory areasThe firm works with large international and domestic clients from all industries and sectors. This year, it moves up in the insurance and construction tables. Duk Mo Chung, Hoil Yoon and Sang Hoon Park are managing partners and vaunted experts in litigation, competition and employment, respectively. The capital markets team grew significantly in the past year with the hiring of six senior lawyers including partners and a senior foreign attorney from Kim & Chang and Yulchon, and two from the Korea FSS and Korea Exchange. Banking and finance, and infrastructure specialist Joon Man Shim departed for Shin & Kim last year. The corporate team experienced a boost with the hiring of three senior attorneys from SK Group, Kim & Chang and Flexre Group, and partner Geunbae Park from Hanwha DefenseSimilar to the other large domestic firms, the dispute resolution group hired 13 to join its ranks as partners, most specialising in litigation and white collar crime. International arbitration specialist Henry Shyn was hired from GE Korea, where he was its GC.

Client feedback 

They have controlled all the legal fees which occur in US Law firm and are experts with e-discovery. – Construction 

M&A Attorneys at Yoon & Yang are relatively young, and as a result are more passionate to foresee unexpected issues. They are not reluctant to provide innovative solutions based on their in-depth knowledge and experience in the M&A fields. In addition, they have good communication skills so they have been resolving complicated issues more smoothly whenever the issue comes up. – Corporate and M&A 

Yoon & Yang is one of the top law firms in Korea and my impression of it has been all positive. Its specialty and professionalism in the fields of international transactions and arbitrations are very satisfactory to our company. The firm's client service and efficiency are excellent in every aspect. – Corporate and M&A 

They are dedicated and efficient, and the quality of service and work is better than other top firms that are likely to charge higher fees. Their strong track record and keen market understanding in the real estate and construction markets, and the related regulations were very helpful. – Corporate and M&A 

As an M&A expert in Korea, I believe it is important to work with experts who have various backgrounds when I handle M&A deals. Comprising accountants, tax attorneys and foreign attorneys as well as Korean attorneys, I believe that Yoon & Yang's one-stop advice is second to none in the Korean M&A market. In addition, Yoon & Yang's M&A attorneys have good negotiation skills and high level of industry knowledge so that I could close the M&A deals successfully. It is always impressive that they come up with fast and effective responses to the complicated legal issues. Therefore, I will continue to retain Yoon & Yang in the future. – Corporate and M&A 

First of all, with respect to advising on the company's key management issues, we think that Yoon & Yang's strengths are : (i) accurate understanding of our needs; and (ii) best solution offerings based on their deep understanding of our business operations. As to the SIAC arbitration case, we are impressed by Yoon & Yang's following expertise: (i) formulating strategies by accurately analysing the facts, and weighing the positives and negatives of relevant issues; and (ii) conducting hearings and cross-examinations. Based on such capabilities, our company was able to persuade the arbitration tribunal to dismiss our case. Regarding the areas of anti-trust anfair trade, we think they are extreme helpful enabling us to comply with relevant laws and regulations through : (i) swiftly identifying regulatory trends of authoritative bodies; and (ii) providing as-needed advice on necessary issues for legal compliance. – Dispute resolution 

They are responsive and provide helpful input. – Dispute resolution 

Partner Chan Keun Park, who is our main contact for labour matters at Y&Y,  always provides us with very accurate and up-to-date legal advice, even on a very short notice. In addition, based on the long and stable relationship with our company, Chan Keun Park is already very knowledgeable of our HR system & policy, which not only saves us a lot of time to explain the case each time, but also helps him come up with very relevant & actionable solutions. – Labour and employment 


Kyung In Jung 

As an outside counsel for our company, Mr. Jung provides insight on key legal issues. In particular, he is a problem solver by getting legal professionals from Yoon & Yang ready, considering who has the necessary background and qualifications to handle various legal problems that tend to occur by nature for large entities. 

Kayoung Kim 

Our experience with Ms. Kayoung Kim is very satisfactory. She has strong communication skills and always provides accurate solutions. She is very detailed and diligent. 

Kayoung Kim is a diligent lawyer who puts her top priority on satisfying our company's legal needs. Her responses are very efficient and quick. 

Myung-Ahn Kim 

Very responsive and client-oriented. 

She is an excellent senior lawyer specialising in international arbitration and various international dispute resolution matters. She has impressive legal knowledge and excellent advocacy skills. In one of our arbitration cases, Ms. Kim acted as the lead counsel responsible for oral advocacy and written submissions, both of which were thoroughly the first-rate! I sincerely believe she is well-suited for leadership in the industry and I recommend her highly for a first tier ranking by Asialaw. 

Sung Jin Kim 

Mr. Sung-Jin Kim is very satisfactory. Especially, he has ample experiences in M&A transactions in almost all the industries. Based on his experiences, Mr. Kim always suggests innovative solutions that satisfies our expectations. 

Sung-Jin Kim, the leader of Yoon & Yang's M&A team, has abundant, hands-on experience in M&A transactions. Based on his extensive knowledge in M&A transactions, he provides creative and practical solutions. 

Chan-Keun Park 

Partner Chan Keun Park, who is our main contact for labour matters, always provides us with very accurate and up-to-date legal advice, even on very short notice. In addition, based on the long and stable relationship with our company, Mr. Park is already very knowledgeable of our HR system & policy, which not only saves us a lot of time to explain the case but also helps him come up with very relevant and actionable solutions. 

Dae Sagong 

Dae is one of the most dedicated, quick and reliable lawyers I've worked with in Korea in the past five-plus years. He provides clear answers to our questions with a good analytical approachwhich often is lacking in Korea-trained lawyers, and grasps the commercial intentions well and quickly. We have given him extremely demanding deadlines but he made them happen, and if it was practically impossible, he would keep us apprised of the status so we could  plan for contingencies. He has a strong ownership of the deals he works on and keeps track of status and deal progress himself, which tremendously helps internal lawyers like myself with dozens of projects to handle at once. When I am on a project with Dae, I can entirely rely on him to update and chase me about that project as needed even when I am swamped with other work. 


Work highlights 

Assisting Hyundai Motor on a $2.6 million tax administrative litigation case for the rejection of the local corporate income tax refund application regarding the deduction of foreign tax credit carryover. 

Advised Samsung C&T Corporation related to tax implications on whether merger-related expenses should be considered deductible expenses 

Represented Rolex as plaintiff in a $1.4 million tax litigation over the repeal of disposition to impose corporate tax on transfer pricing transactions 

Key clients 

Kumho Petrochemical, LG Chem, POSCO, Rothmans Far East

Private equity

Work highlights 

Represented United Asset Management Corporation  on its acquisition of KRW250 billion worth of new shares and convertible bonds issued by STX Offshore & Shipbuilding.  

Acted for Eco Prime Environment Private Equity Fund its acquisition of shares in Hanjin Heavy Industries & Construction from 11 financial institution shareholders. 

Represented Guiding Star Private Private Equity on its $42.5 million sale of its 100% existing shares to Hit Maker.   

Key clients 

Clearwater Capital Partners Singapore Fund III Private, Feynman Investment, Newlake Alliance Management, UTC Investment  

Labour and employment

Work highlights 

Successfully represented Hyundai AutoEver in a Supreme Court case, winning in a case filed by employees of a subcontractor regarding unpaid wages and illegal dispatch.  

Acted for SKF Korea on its win in the Supreme Court over the revocation of unfair labour practices 

Successfully defended POSCO ICT in litigations for alleged discrimination filed by employees of the client's subcontractors 

Key clients 

Hanwha Life Insurance, PB Partners, Seoul Metro, SK Hynix, Yuhan Corporation

Intellectual property

Work highlights 

Advised Hite Jinro in several patent disputes in relation to one of its beer brands’ bottlesAn individual inventor claims that the unique pattern infringes on his patent.  

Successfully represented SK Innovation in a patent defense dispute with LG Chem concerning EV battery technology.  

Acting for KB Insurance in a patent infringement injunction and damage action regarding auto insurance products patents.  

Key clients 

HaatzHanmi Pharma, Kumho Petrochemical, Otis Elevator, SK Chemical, W-Scope

Dispute resolution

Work highlights 

Successfully defended Samsung Electronics Service regarding criminal charge of unfair labour practices due to a series of activities including interference with the establishment of labour unions by their vendors 

Continuing to act for Kolon Life Science after the approval of its drug Invossa was revoked by the Ministry of Food and Drug Safety over allegations of falsified reports.  

Acted for Doosan Infracore regarding its sales of stakes in its subsidiary, DICC in China arising out of a drag-along rights issue. The client won the case in the Supreme Court.   

Key clients 

Asiana Airlines, British American Tobacco Korea Manufacturing, Hanjin KAL, Hanwha Aerospace, Kumho Industrial, Medytox, SK Innovation 

Restructuring and insolvency

Work highlights 

Representing Huf Korea as a creditor in relation to Ssangyong Motor’s rehabilitation.  

Acting for Hyundai BNG Steel as a creditor of Myungil Metal’s unwinding.  

Representing Korea Development Bank on litigations arising out of Dongbu E&C’s workout procedure.  

Advised Korea Welfare Service on its successful bankruptcy filing. 

Key clients 

Daishin AMC, Korean Air, Myung Ju, Posco Plantec, Shinsegae Food

Corporate and M&A

Work highlights 

Advised Korean Air on its landmark acquisition of Asiana Airlines.  

Acted for SK E&C on the sale of SK TNS to Alchemist Capital Partners Korea for $262 million.   

Represented Hana Alternative Asset Management on its $90 million investment in an office building located in Texas, USA.   

Key clients 

Atomic Creative Technology, Guiding Star PE Investment Company,  KOLONKyungdongSebang Global Battery, UTC Investment 

Capital markets

Work highlights 

Advised the Export-Import Bank of Korea on its issuance of $900 milion and 500 million bonds.  

Advising issuer Avellino Lab USA on its IPO in Korea. 

Represented smart financial platform Finger on its listing on the KOSDAQ market.  

Acted for IBM Global Financial Korea on its securitisation of receivables provided by IBM affiliates.  

Key clients 

Busan Bank, CCS Chungbuk Cable TV Systems, Korea Investment & Securities, Kyobo Life Insurance 


Work highlights 

Successfully defended Hyundai Steel in the KFTC’s cartel investigations of seven steelmakers.  

Advised United Technologies Corporation on its merger clearance prior to acquiring Raytheon Company.  

Representing Taekwang Industrial and 19 group affiliates in filing an administrative lawsuit seeking the annulment of administrative surcharges of KRW2.2 billion imposed by the KFTC.  

Key clients 

Dongbu Corporation, Hanjin Heavy Industries & Construction, Hite Jinro, Sebang and Suhkang 

Banking and finance

Work highlights 

Acted for KCLAVIS Asset Management on its $60 million loan to a US real estate developer for the construction of a condominium building in Manhattan, New York.  

Represented Big Island in Geoje on the project financing for the Gohyeon Port Redevelopment Project.    

Key clients 

IBM Global Financial Korea, Igis Asset Management, KORAMCO REITs, LAMBDA Investment Management, Woori Bank


Work highlights 

Advising Hanwha E&C on its Northern Seoul Station Area Development Project, a KRW2 trillion construction project designed to revitalise the historic Seoul Central Station and its surrounding areas 

Representing POSCO E&C in a dispute on payment of monies to cover the additional costs incurred over a coal transport facility in the Philippines.  

Defending POSCO E&C in a damages claim suit filed by residents of the surrounding areas of the Incheon North Port Tunnel.  

Key clients 


Aviation and shipping

Work highlights 

Advising SK Shipping in dispute against Korea Gas Corporation arising from faults of a Korean LNG containment system. 

Representing Posco Plantec in a $1.7 million dispute with Hyundai Marine & Fire Insurance arising from the insurance company’s denial of insurance claims related to the damage its crane suffered when a sea carrier hit it during inclement weather. 

Acting for Intops and Panama Arro Shipping in relation to the charterer’s failure to pay. 

Advising Korean Air on its entire business rehabilitation plan.   

Key clients 

Hanjin KAL, Intergis Corporation, Korea Investment & Securities


Work highlights 

Acted for Heungkuk Fire & Marine Insurance on its lawsuit requesting the FSC’s cancellation of its fine on the client. The case is pending at the Supreme Court.  


Represented Hanwha Life Insurance on the merger between Hanwha Life Asset and Hanwha Financial Asset.  

Key clients 

General Electric Company, KB Insurance, MG Non-Life Insurance, NongHyup Life Insurance

Real estate

Work highlights 

Advised KCLAVIS Asset Management on its junior mezzanine loan to a US real estate developer for the construction of a 19 story condominium building in New York.  

Assisted KOREAMCO REITs Management Trust on all aspects of purchase and lease transactions related to loan transactions.  

Acted for Kocrep 52 REITs on the land purchase and building of a property in Icheon, Hangdong Province in Korea.  

Key clients 

Igis Asset Management, Korea Securities Finance Corporation