The Japanese noun '六十 (ろくじゅう)' means 'sixty'. It is a number used to represent the quantity or age of sixty. This word is commonly used in contexts involving counting, age, or numerical references. For example: He is sixty years old「彼は六十歳です」(かれはろくじゅうさいです). The price is sixty yen「値段は六十円です」(ねだんはろくじゅうえんです). Note that '六十' is often combined with counters or other words to specify context, such as '六十歳 (ろくじゅうさい)' for 'sixty years old'.