In one episode, Iwata accidentally walks into a woman's locker where we see half naked women(Naked but covered/In underwear), nothing explicit.

During an episode about bowling, constant ball jokes and mild cock jokes are said.

Some mild sex references. In the last volume (Rated 15 in the UK), the episode "Going Too Far" contains strong sex references and nudity.

A character's breast size is once mentioned.

Some throughout, but not much blood shown.

In "Going Too Far", MASSIVE amounts of blood are shown. This is all done in an over the top way. In the same episode, Earth is flooded with Hyatt's blood.

Excel accidentally throws a middle finger in one episode.

5 uses of Fuck throughout the series.

Mild language: Damn, ass, hell

Moderate language: Bitch, bastard

Strong language (in "Going Too Far"): Fuck (once)

More uses of the f-word in the English dub, though infrequent (once an episode, if used).

Little profanity in the original Japanese version.

Characters can be seen smoking cigarettes/cigars.

Nothing particular intense or extreme until the last episode. Then, certain scenes may be a little disturbing.