As of February 2025, it has almost 1,451,000 articles[2] with 13,046 active contributors, ranking fourth in the latter metric behind the English, French and German editions.

The Japanese Wikipedia has been accused of historical revisionism by a number of scholars, especially its pages on World War II.

[19] This award, normally given to individuals for great contributions to the Internet in Japanese, was accepted by a long-standing contributor on behalf of the project.

[35] Nobuo Ikeda, a known public policy academic and media critic in Japan, has suggested an ongoing "2channel-ization" phenomenon on the Japanese Wikipedia.

[39] Attention was drawn to the Japanese Wikipedia article on Kozo Iizuka (飯塚幸三), which used to describe his accomplishments in detail, with no mention of how he killed a woman and her young daughter in the Higashi-Ikebukuro runaway car accident that made him a household name in Japan.

[40] An administrator applied protection to the article and later explained that the Japanese Wikipedia community takes legal risks arising from potential privacy violations very seriously, as there is no local chapter of the Wikimedia Foundation to support them in court.

[41] In a 2018 book, Florian Schneider of Leiden University compared and contrasted Chinese (Wikipedia and Baidu) and Japanese articles (南京事件) on the Nanjing Massacre.

[42] In a talk sponsored by the Wikimedia Foundation, Kitamura argued that the revisionism was, in part, the result of a severe shortage of administrators.

[13]: 16:00 In a 2021 article, professor Chelsea Szendi Schieder of Aoyama Gakuin University[43] described Japanese Wikipedia's coverage of World War II as right-wing revisionism, and argued there was a divergence between right-wing narratives that are popular online in Japan and academic writings in English.

[15] An interviewee alleged that an editor and administrator collaborated to manipulate the website, which resulted in the Wikimedia Foundation investigating the situation.

[46] The community reportedly held numerous discussions on if and how to regulate IP users, but failed to reach consensus due to polarized opinions.

[47] At the 10th Wiki Workshop on 11 May 2023 hosted by the Wikimedia Foundation, Taehee Kim, David Garcia, and Pablo Aragón analyzed which articles were controversial on the Japanese Wikipedia.