| Main office | 36, Noksansandan 289-ro, Gangseo-gu, Busan, Korea |
|---|---|
| Gwang yang business office | J21, Chonamgongdan 2-gil, Gwangyang-eup, Gwanyang-si |
| Pohang business office | 1797-42, Munbok-ro, Sannae-myeon, Gyeongju-si |
| jkec@jkec.co.kr | |
| Tel | +82-51-831-2571 |
| Fax | +82-51-831-2578 |
