Nikoniko Douga, the largest Japanese videofeed site, has taken down the channel belonging to Zaitokukai (the "Association Against Special Treatment of Koreans in Japan"), the extremist group known for organizing "hate speech" demonstrations against Korean residents of Japan. The terms of use of Nikoniko prohibit "expressions of national, religious, or racial discrimination". 

[English summary of Japanese article, by Business & Human Rights Resource Centre]