A law firm proven by results
From corporate and investor disputes to personal matters, a responsible attorney stays with every case from start to finish.
- 2 Years RunningLegal Times recognition
- 20,000+Cases handled
- 50+Professionals and staff
* As of October 2026; matters handled include litigation and advisory work since the firm's founding in 2017.
NOTABLE MATTERS IN THE NEWS
- 2026 Representing 319 JTBC/JoongAng Group bond investors in a criminal complaint against 20, including the owner familyCapital markets & investor protection
- 2025 Mapo incinerator site decision cancelled on behalf of 1,850 residents, now finalAdministrative litigation
- 2024 KRW 2 billion fine on a crypto exchange cancelled by a court for the first timeVirtual assets & financial regulation
- 2022 Yeogi Eottae data breach class action: among the highest damages awarded under the Network ActPrivacy & class actions
- 2022 Hanmi Pharm delayed disclosure: investors win damages through the Supreme CourtSecurities & disclosure liability
Proven Excellence,
Recognized by the Market
Law Firm Changchun has been named a “Hidden Champion” and an “Up & Rising Firm” for two consecutive years (2024–2025) in the Legal Times “Law Firm Consumer Report.”
We aim to be more than legal advisors — a strategic partner who elevates the value of our clients' businesses and lives. Built on integrity and trust, we create our clients' success together.
About UsWhat we do
Corporate Advisory · M&A
Corporate governance · Management disputes · M&A contracts and advisory
Construction · Real Estate
Redevelopment · Reconstruction · Real estate development and trusts
Sports · Entertainment
Exclusive contracts · Publicity rights disputes · Management advisory
IT · Startups
Fundraising · Regulatory sandbox · Trade secret protection
Labor & Employment
HR and labor advisory · Wrongful dismissal · Collective bargaining
AML · Compliance
AML systems · Internal controls · Corporate ethics codes
Tax
Tax audit defense · Tax tribunal appeals and administrative litigation
Civil · Class Actions
Large-scale class actions · Damages claims · Civil disputes
Divorce · Inheritance
Property division · Custody disputes · Wills and estate administration
Criminal Defense
White-collar crime · Election law violations · General criminal cases
Recent cases and news
JTBC Corporate Bond Mis-Selling — Representing Injured Investors Against Alleged Concealment of Capital Impairment
JTBC Bondholder Response Draws Intensive Media Coverage — Collected Reports
Blocking Demands to Void a Pre-Sale Contract and Assume a Loan — The Applicant Withdrew the Entire Mediation Request
“We Need to See Where the Bond Proceeds Went” — Interview with Jaesun Yoon, Managing Partner of Changchun, Counsel for JTBC Bondholders (Legal Times)
Defeating a Down-Payment Refund Claim Premised on "Termination for Statutory Violation" — Defending a Pre-Sale Developer
A Sewer Pipe Across the Ceiling of a Purchased Retail Unit — Recovering Damages for an Undisclosed Design Change
Partners
Contact Us
If you need help with a legal matter, please contact us at any time.