Deluxe Da Yo! Kaishain: Has Aired 900+ Episodes

Deluxe Da yo! Kaishain

This 2019 slice-of-life ONA is perhaps the only show on this list that belongs to the post-2000 anime era. The reason it’s been able to accumulate so many episodes within a short span of time is that each episode is only 2 minutes long.

This anime can be said to be a remake of the original show with the same name. The story is fairly basic, where it follows the day-to-day life of a man named Kamoyama, who ends up working as the Sales Department Z’s manager – for shellfish!