I’m probably starting to sound like a broken record with these two series, but Mushishi is a slow series about a guy who travels around and solves peoples’ supernatural problems, usually with strange brings called mushi.

Natsume Yuujinchou is a series about an orphan boy, who moves to a small town, and discovers more about his mother, makes friends, and other slice of life things. Oh, and his mother made a deal with a bunch of yokai, and he is left to help these yokai, with the help of one, who takes the form of a cat.

I wish there are more mystery series out there, for some reason, all I can think of is Hyouka and Paranoia Agent.

Speaking of Paranoia Agent, I see you have Paprika, and Perfect Blue, may I recommend Millennium Actress, and Tokyo Godfathers, also by Satoshi Kon.