- Cheonan Plant : Ja Kyung Chemical, 196, Seonggeo-gil, Seonggeo-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do, Republic of Korea
- Tel : 041-622-0774Fax : 041-622-0777
- Indeokwon R&D Center : C-809, 40, Imi-ro, Uiwang-si, Gyeonggi-do, Republic of Korea (Indeokwon IT Valley, Poil-dong)
- Tel : 031-426-1772Fax : 031-8084-3772
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