Female upper Nudity is present in both season 1 and 2 but it is not sexual.

Unlike Fujiko F. Fujio's most popular work, Doraemon, this series has raw portrayals of history. For example, there are instances of graphic violence. In one episode, a caveman is fighting a beast and you can see blood spraying all over the forest they're in, while in the episode depicting a witch trial in France, you can see a partially topless woman getting burned alive.