Japan is NOT part of Asia according to some Japanese. Japan is separated from Asian continent by water, and some Japanese believe it's not part of Asia. If they say something like: We are building new factories in Asia, the phrase would explicitly mean We are building new factories in Asia, but outside of Japan.
Castor oil is used to treat constipation. It may also be used to clean out the intestines before a bowel examination/surgery. Castor oil is known as a stimulant laxative. It works by increasing the movement of the intestines, helping the stool to come out.
As a pharmaceutical grade inactive ingredient, castor oil is used to emulsify and solubilize oils and other water-insoluble substances. A brand name product that contains castor oil is Cremophor and it contains a range of non-ionic polyethoxylated detergents. It was originally developed for use as solubilizers and emulsifiers.