Long ago, one of the most beloved Shōnen Jump series of all time made a solid case for anime filler in a condensed, funny package. Gintama is a well-worn shōnen series renowned for its comic take on a genre that, during its heyday, often took itself too seriously, in a way, serving as a forerunner to franchises like One Punch Man. Gintama has won enduring success without abandoning its themes or a serious tone altogether, and it’s earned a place in shonen’s pantheon of genre greats, as well as a brand-new Gintama anime shown off at Jump Festa.

https://screenrant.com/anime-filler-explanation-gintama-factoid/