Attorney
Yongjun Ko
Practice Areas
Key Achievements
Criminal Defense (Pre-indictment)
- •Multiple acquittals in (quasi-)rape cases in private spaces
- •Acquittal in forced molestation of minor case
- •Fine for public indecency during probation for forced molestation
- •Represented plaintiff in workplace sexual harassment case
- •Numerous other rape and sexual assault cases
- •Acquittal in illegal filming of intimate video between partners
- •Probation for child sexual exploitation material production
- •Probation for mass download of child exploitation material from dark web
- •Suspended prosecution for purchase and possession of sextortion material
- •Probation for habitual mass illegal filming on subway
- •Probation for blackmail using intimate video
- •Represented plaintiff in illegal filming and distribution case
- •Numerous other digital sex crime cases
- •Acquittal in minor prostitution case
- •Suspended prosecution for multiple/habitual prostitution
- •Numerous other prostitution and solicitation cases
- •Suspended prosecution for LSD, MDMA, cannabis purchase and use
- •Probation for methamphetamine use recidivism during probation
- •Third cannabis purchase suspended prosecution after two prior suspensions
- •Probation for cannabis smuggling
- •Suspended prosecution for habitual cannabis purchase worth 20M KRW
- •Numerous other drug cases
- •Acquittal in document forgery and fraud case
- •Acquittal in investment/Ponzi scheme fraud case
- •Investigation closed for voice phishing account provision
- •Probation for voice phishing collector without full restitution
- •Probation for large-scale breach of trust
- •Numerous other economic crime cases
- •Acquittal in plastic surgery review defamation case
- •Acquittal in internet broadcaster comment defamation case
- •Acquittal in lawyer lecture review defamation case
- •Represented plaintiff in Naver stock forum CEO insult case
- •Acquittal in 1.4B KRW cryptocurrency hacking case
- •Represented plaintiff in malicious hacking case
- •Numerous other cyber crime cases
- •Acquittal in hit-and-run injury case
- •Fine or probation for repeat DUI offense
- •Numerous other traffic accident/DUI cases
Administrative Appeals & Litigation
- •Won administrative lawsuit against NHIS recovery
- •Won administrative lawsuit against prosecutor disclosure refusal
- •Won administrative appeal against license revocation
- •Numerous other administrative litigation
General Civil Litigation
- •Won damages claim for stalking and threats (plaintiff)
- •Won fire damage claim defense (defendant)
- •Numerous other damages cases
Corporate Advisory
- •Numerous trade secret and copyright violation cases
- •Legal counsel for multiple corporations
Related News
Creating deepfakes while in the military, from jail time to forced transfer
Hanbyol Law LLC Attorneys Eunseok Heo and Yongjun Heo warned of possible arrest and notice to appear in 1-4 weeks based on suppression of evidence
2/3/2026
AVMOV Subscriber "I commented and got points, am I getting caught?"...Lawyer...
Attorney Han Byul recommends proactive, controlled response as subscription and activity records can be investigative leads
12/29/2025
Qualifications
- Korean Attorney (Korean Bar Association, Seoul Bar Association)
- Criminal Law Specialist certified by Korean Bar Association
Education
- Graduated from Busan Hyegwang High School
- Graduated from Hanyang University, Department of Political Science and Diplomacy
Professional Career
- Senior Attorney, Criminal Defense Team, Hanbyol Law, LLC
- Criminal Law Specialist, New Lawyer Law Office
- Senior Attorney, Taerim Law Firm
- Partner Attorney, Team 4, Seoul HQ, Ohyun Law Firm
- Attorney, Divorce Specialist Team, Ohyun Law Firm
- Attorney, Criminal Specialist Team, Ohyun Law Firm
Languages
Korean