Japan consists of Hokkaido, Honshu, Shikoku, Kyushu, Shikoku and more than 3,000 islands, including Ryukyu Islands in the south and Ogasawara Islands and Shikoku Islands in the north, covering an area of 377,800 square kilometers, equivalent to 1/26 of China.

Historically, England, Scotland, Wales and Ireland are four countries. Later, England and Wales merged through marriage, and then Elizabeth I, the last king of Tudor dynasty, passed it on to her nephew James, king of Scotland, and Scotland and England merged. James' son Charles was overthrown by Cromwell's revolutionary army. During Cromwell's reign, Ireland was conquered by force. 1923, the British Parliament decided to split Ireland in two. Twenty-three counties in the south became independent Irish republics, and four counties in the north remained in Britain as Northern Ireland. Great Britain is an island, which consists of England, Scotland and Wales. The so-called UK is the abbreviation of Unit kingdom, which means the United Kingdom.