Korean websiteEK Korean
CSAT Korean study platform
EK Korean is the English brand of 김은광수능국어, a registered sole proprietorship in Seoul, South Korea.
Company facts
| Registered trade name | 김은광수능국어 |
|---|---|
| Legal form | Sole proprietorship (simplified VAT taxpayer) |
| Business registration no. | 372-06-03170 |
| Online sales registration | 제2025-서울마포-1160호 |
| Business established | |
| Web platform launched | |
| Funding | Bootstrapped; no external investment |
| Founder & owner | Eunkwang Kim (김은광) |
| Location | Mapo-gu, Seoul, South Korea |
| Contact | eun7661010@ekkorean.com |
What we build
We help Korean high school students prepare for the Korean language section of the College Scholastic Ability Test (CSAT), South Korea's university entrance exam.
- Live online classes on Zoom, Wednesdays and Fridays at 22:30 Korea Standard Time, with recordings for review.
- Free public study content: a CSAT Korean wiki, EBS Suneung Special literature OX (true/false) practice, study columns and YouTube lessons.
- Mock exam OMR answer-sheet analysis reports, an AI study planner and learning statistics.
How we use Claude
Today
We use Claude Code to develop the product and Claude Opus for mock exam analysis and learning content verification.
Next: a planned pilot
Direct student-facing Claude tutoring is not currently available. We plan to pilot it after implementing instructor review, age verification, moderation and clear AI disclosures.
Founder
Eunkwang Kim (김은광), Founder & Owner
Before founding EK Korean, Eunkwang taught CSAT Korean for over 15 years and previously founded Erion, a separate live-streaming edtech company (2017–2024). Erion's funding is not part of EK Korean.
Verification
Our business information page (Korean) lists the registered trade name, owner and registration numbers.
To check business registration status, use the Korean National Tax Service (NTS) Hometax business status lookup (사업자등록상태 조회) with registration number 372-06-03170.
Links
Explore our public study content in Korean.