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.
It has been used to study its impact on rat lens condition. Castor oil has also been used as a test reagent for studying the dose-response relationship and mechanism of action of Saccharomyces boulardii by utilizing the rat model of castor oil-induced diarrhea.