US Patent No. 10,196,587 B2 (Yasuhiro Doi); Kao Corporation, Tokyo, has patented a cleansing composition for skin and hair that comprises an internal olefin sulfonate having 12 or more and 24 or less carbon atoms, wherein the total content of an internal olefin sulfonate having 16 carbon atoms and an internal olefin sulfonate having 18 carbon atoms in the internal olefin sulfonate is 95% by mass or more; a content of an internal olefin sulfonate in which a sulfonate group is present at the C-2 p...