Looking for recommendations for a 10-year-old

I'm looking for recommendations for an anime series for a 10-year-old relative, ideally something available on Netflix or a similar streaming service in the U.S.. He's into Lord of the Rings, Harry Potter, Minecraft, Ninjago, etc. Long adventures, magic, etc. all are great. Must be age-appropriate (limited violence ok but nothing gory / graphic) please. Thank you!