Many Japanese words of Portuguese origin entered the Japanese language when Portuguese Jesuit priests and traders introduced Christian ideas, Western science, medicine, technology and new products to the Japanese during the Muromachi period (15th and 16th centuries).
The Portuguese were the first Europeans to reach Japan and the first to establish direct trade between Japan and Europe, in 1543. During the 16th and 17th century, Portuguese Jesuits had undertaken a great work of Catechism, that ended only with religious persecution in the early Edo period (Tokugawa Shogunate).