The world of the supernatural is a terrifying place, especially when youkai decide to seek revenge and punish humans for their careless ways. Luckily, help is at hand in the form of a young ghoul named Kitarou, who has taken it upon himself to protect mankind from malevolent monsters. With the help of his walking, talking eyeball of a father and his various spiritual friends – including the tricky and rather smelly Nezumi Otoko, the tomboyish Neko Musume, and the elderly Sunakake Baba and Konaki Jiji – Kitarou defends the clueless humans from soul-stealing Yasha, demons of death and many, many more.
Natsume is lonely; he has an ability that separates him from others: he can see and interact with spirits. Soon, however, Natsume discovers that he’s not alone: his grandmother Reiko also had the gift. But things get hectic and possibly dangerous for Natsume when he finds out that he also inherited the 'Book of Friends', a book that contains the names of all the spirits Reiko defeated and subjugated. He finds himself hounded by his grandmother's underlings and, with the help of a 'cat' charm spirit, decides to free them from the Book's shackles, as well as protect the book from those who seek to misuse its power...
These series are kind of like two sides of the same coin. Whereas Natsume Yuujinchou focuses on helping spirits, GeGeGe no Kitarou is more about stopping harmful spirits from harming humans. However both of these series are heavily rooted in Japanese mythology, so for anyone who holds an interest in that, both these series are a must-see.
Since he was a child, Kantaro Ichinomiya has had the ability to see demons; but one day, the young Kantaro was told of a goblin so powerful that it could vanquish any foe with ease. Intrigued, his search began. Now, in the present, Kantaro works as an exorcist, banishing demons who have possessed human bodies; yet still he searches – that is, until one day, he touches a mysterious seal and releases the legend itself! His name is Haruka, he's good with the ladies, and he can kick demon butt like no other; but can he help Kantaro raise enough money for his rent?
Both GeGeGe no Kitarou and Tactics are steeped in Japanese mythology and the supernatural. Both also focus on someone preventing/exorcising spirits who are causing trouble for humans. If you liked one then definitely check out the other.