Nobody talks about this one. That needs to stop. A ghost kid pulling pranks for 510 episodes sounds like a gimmick that should collapse by episode 20, but the show rebuilds itself every few minutes, finding a new angle on chaos before you get tired of the last one. The comedy doesn't rely on plot or character arcs or anything that would slow it down. Each short is a pure setup-punchline machine where a mischievous spirit and the humans around him collide in ways that land because the timing is surgical and the absurdity is committed. This is what happens when a show trusts that funny is enough, and it absolutely is.
Q-taro, a monster who lives with the Ohara family, returns in this sequel to Shin Obake no Q-taro. He can fly and turn his body transparent, but unlike other monsters he cannot change his body into other things. Scatterbrained by nature, he keeps making mistakes and stirring up trouble. The format is a long-running short-episode supernatural comedy, stretching to 510 episodes.