Laminaria japonica is large seaweed belongs to the brown algae family Phaeophyceae. It can be found predominantly on rocky shores in temperature to boreal waters. It is important not only because it forms seaweed ecosystems along Asian coasts, but also because it is used commercially in eastern Asian countries. It has been utilized since ancient as an important food resource for humans. Recently, scientists’ interest in seaweed lipids has been on the rise owing to the recognition of their bioactive molecules that have physiological effects in the treatment of tumors and other cancer-related problems. Fucoxanthin, one of the most interested carotenoid has been found with the abilities on anti-obesity, anti-cancer and anti-inflammatory effects. Fucoidan, the important polysaccharide also found to exhibit weight loss effect and anti-viral function.