In one episode there's a scene when a teenager killed a man by punching him repeatedly in the face until his skull crushed we can see his fist stuck in the man's face briefly while he was trying to get his fist out of the man's face this scene is extremely disturbing and violent. Then he is shown going into a rampage killing everyone on sight we see blood scattering. (Too violent in TV-PG on Adult Swim)
The show get more violent and darker as the series goes on near the end of the show there is a really graphic scene of a girl committing suicide by stabbing herself in the neck with a knife we see blood scattering from the wound (uncut version)
A man got eaten alive by a group of sharks on screen not too graphic as the scene was shaded with a huge amount of blood after they started eating him.
In some episodes characters are getting chopped and losing arms.
In some episodes characters are getting stabbed in the series.
A lot of severe and graphic violence.
Mostly over-the-top ninja battles throughout course in this series. The content grows up a bit with them: Violence is central to the story and involves hand-to-hand combat using a huge array of weapons and special techniques that cause harm and show light-to-moderate amounts of blood.
Over the course of 500 episodes, the series is focused on martial arts battles where characters using hand to hand combat with blades, projectiles, bombs, and other weapons. But the thing about this series is that any minor and major characters will die, and it gets intense and violent as the series progresses.
Moderate to severe depending on how you scale.
The typical fighting anime: punches and a little blood.
This Shippuden Fights can be intense and certain characters do die, much more bloodshed and violence than in the original "Naruto" series. (Worse that like airing on Cartoon Network children's television network in original episodes 2002 and Shippuden 2007 on Disney XD)
War is a very prominent theme throughout the series, several villages are shown being in ruins during flashbacks and the effects of wars are shown. One of the main villains is a war orphan.
In all battles we see lots of violence and blood. Characters are smashed, thrown down from great heights, decapitated, and sometimes brutally killed by people that they love. In some episodes we see lots of people losing their houses and families by giant tailed creatures and other ninjas.