The Japanese Wikipedia (ウィキペディア日本語版, Wikipedia Nihongoban, literally "Wikipedia: Japanese-language version") is the Japanese-language edition of Wikipedia, a free, open-source online encyclopedia. Started on 11 May 2001, the edition attained the 200,000 article mark in April 2006 and the 500,000 article mark in June 2008. As of May 2023, it has over 1,375,000 articles with 14,174 active contributors, ranking fourth behind the English, French and German editions. As of June 2020, it is the world's most visited language Wikipedia after the English Wikipedia. More information...

The website is placed before and after in the BestRef global ranking of the most important sources of Wikipedia.

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