Bleach, Nurarihyon no Mago Recommendations
At the first sight, both series have very little in common. But if you have read one of them and got into it, you'll get a feeling of many similarities while reading the other one. In both of them there are strange creatures and supernatural phenomena. The main protagonist is a character bound to two different worlds and as the story develops, they encounter more and more serious opponents and they try as hell to get stronger in order to protect what's important to them. Plus, both series employ some traditional Japanese beliefs.