No nudity. Shinobimaru only shows Kennosuke-sama a Playboy-magazine which doesn't show a single sight of nudity, just some brief romantic pictures.

A pig-like character named Shinobimaru gets a hard landing after jumping from a roof a couple of times all together. A couple of ants almost get crushed after Shinobimaru's second jump attempt.

Kennosuke-sama hits a boy with his fist.

Kennosuke-sama gets into a sword fight against three men. This scene is very mild. No blood.

We see that Kennosuke-sama has been hit in his head for some reasons during the end credits.

Kennosuke-sama's mother shows her son a middle finger.

The violence which takes place in this short animation by Toei is very mild, sometimes slapstick/humorous.