Season 4
Natsume's Book of Friends
Takashi Natsume, the timid youkai expert and master of the Book of Friends, continues his journey towards self-understanding and acceptance with the help of friends both new and old. Natsume, while briefly separated from Nyanko-sensei, is ambushed and kidnapped by a strange group of masked, monkey-like youkai, who have spirited him away to their forest as they desperately search for the Book of Friends. Realizing that his "servant" has been taken out from right under his nose, Nyanko-sensei enlists the help of Natsume's youkai friends and mounts a rescue operation. However, the forest of the monkey spirits holds many dangerous enemies, including the Matoba Clan, Natsume's old nemesis. Stretching from the formidable hideout of the Matoba to Natsume's own childhood home, Natsume's Book of Friends Season 4 is a sweeping but familiar return to a world of danger and friendship, where Natsume will finally confront the demons of his own past.
Episodes
Natsume Captured
Natsume is jumped by a group of Youkai trying to steal the Book of Friends for their master. Once captured, Natsume discovers that an old problem is back in a big way.
The Eastern Forest
Natsume, now trapped in the mansion, is trying to keep the Monkey Mask youkai from revealing the Book of Friends to Matoba. While Hinoe and Misuzu attempt to find the strange youkai's master.
The Little Ones
After Natsume returned Amana's name, she accused him of stealing her ring. He has three days to find and return it before she burns down his house. To make matters worse, the ring is trapped in the hair of a migratory youkai, and Nyanko-sensei is unable to use his powers.
Stand-In
Natsume is at home early one evening when he hears a knock on the door. He sees Tohko outside, asking to be let in. But when he opens the door, there's nobody there, and a gust of wind rushes past. Another Youkai is after the book of friends!
To You, From Bygone Days
An old classmate Yuriko, remembers her time watching Natsume and how he was a little weird. A clingbug from Natsume's past reminds him of the time he spent running from a youkai with a grudge.
The Other Side of the Glass
Natsume overhears whispers that a powerful youkai is reviving, later that evening he is trapped in a bottle as an offering. Humans can't see or hear him, so Nyanko-sensei decides to help the “best” way he can…
The Gap Between Humans and Youkai
Natsume's greatest fear has come true. Someone not involved in the world of youkai is hurt because of him. Natori needs Natsume to regain his composure or they will be eaten by Omibashira!
When I Was Deceived
Natsume is walking home one day when he's accosted by a flying Tengu, who lifts him up into the sky! Meanwhile, Nyanko-sensei is stuck in a well, where Nanase tells him a story about how she learned to never get close to a youkai.
The Moon-Splitting Festival
Every 10 years the followers of Houdzuigami and Fudzukigami have a battle to determine the fate of the land. Natsume is approached by the followers of Houdzukigami to act as their missing god. Natori has been given the job of finding the missing god or seal Fuduzkigami before he wins.
The God, Enshrined
While being swept down the river, Natsume managed to feel the presences of Hudzuki-gami. Natori must make the choice to follow Natsume instincts or seal Fudzuki-gami.
A Single Photo
Natsume gets a call from a relative: his parents home is being sold. He tells himself that it doesn't matter, and that he's forgotten his past. But he's not nearly as over it as he thinks...
The Door of Memories
Natsume is going home for the last time, but first he must stop by his relative's house to get the key. But he is cautious, as inside is a youkai that tormented Natsume, and a girl that has always resented him.
A Long Way Home
Natsume is possessed by a spirit. Obsessed with returning home, he remembers the events that occured just after his father's death.