Violence: I had to up the violence count for this season because of one episode. Spoiler: We see more blood, because some youkai are being unwittingly sacrificed to revive a more powerful youkai who was once sealed away. It isn't graphic by any means, all you see is blood, but I thought it would be worth a mention.

Sex and Nudity: None. It is as clean as ever.

Theological Themes: There's nothing worse than usual. Some youkai have their own festival kind of like gods, since their powers have an effect kind of like Groundhog Day, except causing famine.

Problematic Themes: Nyanko-sensei still likes his alcohol.

Overall: After season 3, I didn't think it would be possible for Natsume's Book of Friends to get any better. Lo and behold, it did. It remains one of the most beautiful and heart-wrenching series I've ever watched.

The finale was simply beautiful and it made me super emotional. Natsume's overcome so much, and I'm proud of him. He's learning to accept the past and move forward. He even has strong bonds with his classmates and friends.

Other characters get fleshed out as well. Taki grows as a person and realizes what she wants to do with her life in terms of youkai, as does Tanuma. The older Matoba exorcist also gets some backstory about how she became an exorcist.

I can't stand his cousin, though. I wish she came to realize the way she treated Natsume when they were kids was wrong. Even the way he was acting when he came to visit could easily be interpreted as panic attacks, but she refused to show him any sort of kindness.

Natsume's Book of Friends is just so beautiful, and I will not hesistate to recommend it to anyone.