I have summarised some quick facts about Japan  for you.
Geographical Location: Asia Pacific
Currency: Yen (¥)
Population: around 130 million people
Area: around 378000 square kilometers
Current Prime Minister: Shinzo Abe
Legislature: National Diet (Upper House + Lower House)
Total Number of Prefectures: 47
Main Regional Languages: Eastern Japanese, Western Japanese, Ryukyu languages, and Ainu languages.
Top 20 Countries that are Llearning Japanese: Korea, China, Indonesia, Australia, Taiwan, USA, Thailand, Vietnam, Hong Kong, Canada, Malaysia, Philippines, New Zealand, Brazil, UK, India, France, Singapore, Sri Lanka, and Germany . Please see the figure below for more details.
Fig. 1 – Top 20 Countries Learning Japanese 
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Sources: http://en.wikipedia.org/wiki/Japan  Survey on Japanese-Education Abroad 2009 by Japan Foundation, http://www.jpf.go.jp/e/japanese/survey/result/index.html