The four major islands of Japan are Honshu, Hokkaido, Kyusha, and Shikoku. The island of Honshu is referred to as the mainland because it is the largest. Edit
When and why was the IWC formed? The IWC, which stands for the International Whaling Commission, was formed on December 2nd, 1946 in order to âprovide for the proper conservation of whale stocks and thus make possible the orderly development of the whaling industryâ (http://iwc.int/history-and-purpose)
The IUPAC was formed in 1919 by scientists and academicians who recognized a need for standardization in chemistry. The predecessor of the IUPAC, the International Association of Chemical Societies (IACS), met in Paris in 1911 to propose issues that needed to be addressed.