anonymous (japanese)
General tag for the Japanese equivalent to Western drawfags.
While most commonly associated in the West with Futaba Channel anons, in particular when drawn in the yellow/beige imageboard colors, this tag also includes anonymous galleries (ex. Asame Shinbun's old gallery URL), shared oekaki imageboards between various websites, open oekaki imageboards run by individual artists (ex. Harada Takehito), and even textboards where the images are shared using third-party websites such as Imgur.
If the art in question is sourced from a matome or thread reposting website, please tag with third-party source.