Japanese language, a language isolate (i.e., a language unrelated to any other language) and one of the world’s major languages, with more than 127 million speakers in the early 21st century. It is primarily spoken throughout the Japanese archipelago; there are also some 1.5 million Japanese immigrants and their descendants living abroad, mainly in North and South America, who have varying degrees of proficiency in Japanese. Since the mid-20th century, no nation other than Japan has used Japanese as a first or a second language.