One of anime and manga genre that was once incredibly popular is gangster stories. Typically referred to as "yanki" fiction (due to a slang term describing gangster youth in Japan), these types of anime have dwindled over the years, especially as anime has attained more international popularity. Thankfully, an upcoming anime adaptation of a manga may change that fate, all while riding the wave of another series.
Source：https://www.cbr.com/fable-new-anime-grounded-tokyo-revengers-version/
