Natsume's Book of Friends
#1 - Long Way Home 9.00
Season 4 - Episode 13
Natsume, possessed by the youkai, thinks of an painful incident from his childhood involving the family he was living with at the time. The youkai offers to eat all his memories, so that he will no longer have to relive his pain.
#2 - The Stolen Book of Friends 8.91
Season 2 - Episode 1
While outside during school Natsume is hit with a ball while reading. He goes to retrieve the ball and ends up breaking a Youkai's seal (much like he had with Nyanko-sensei). Later that night Natsume and Nyanko-sensei discover a look-a-like of Nyanko, only to have him steal the Book Of Friends!
#3 - Other Side of the Glass 8.89
Season 4 - Episode 6
Natsume is trapped in a bottle by a youkai to be offered to another named Omibashira. Nyanko-sensei transforms into Natsume and goes around his school to ask his friends about Omibashira, but gets Tanuma involved. Tanuma is attacked by one of the youkai that trapped Natsume and loses him, but as he runs through the forest looking for Natsume he finds a mansion behind the school. When Tanuma is suddenly able to see the youkai walking up the steps to the mansion, he is found out by a youkai with a bag over its head.
#4 - To You, From Bygone Days 8.80
Season 4 - Episode 5
In the town Natsume used to live in, a girl recalls Natsume. She remembers his strange actions and wanted to understand him. Meanwhile, Natsume encounters a small Youkai which reminds him of the same girl and town.
#5 - The Little Fox's Hat 8.77
Season 1 - Episode 7
Natsume goes to a hot spring for a school trip, with an errand from Shigeru to pick up Teacups from a near by pottery. While there he meets and helps a little fox spirit, who quickly grows attached to him.
#6 - Nyanko's Book of Boredom
Season 1 - Episode 11
When Natsume finally has enough of Nyanko's behavior Nyanko leaves, wandering about by himself and causing trouble.
#7 - The God, Enshrined
Season 4 - Episode 10
Natsume is pretending to be the god Houzukigami, so the moon splitting festival will end with a victory and the mountain will not be ruined. Winning the contest will not be easy, but with help from Natori he will find the way.
#8 - Fleeting Light
Season 1 - Episode 8
Natsume meets a spirit who used to be friends with a man who could also see spirits, but one day lost this ability.
#9 - When I Was Deceived
Season 4 - Episode 8
Nyanko-sensei falls into a well and discovers that there is a barrier inside it, as well as Nanase, Matoba's assistant. She is looking for a certain stone with a youkai she had sealed in it, and tells Nyanko-sensei the story of how she met the youkai to pass the time.
#10 - The Letter From the Exorcist
Season 5 - Episode 3
Natsume receives a letter from Matoba, an exorcist whom he's had unpleasant dealings with in the past. The world of exorcists is a dangerous place lately, and Matoba wants Natsume's help. Natsume wants to refuse, but Matoba threatens to reveal Natsume's powers to his adopted family, which would spell the end of his peaceful life.
#11 - Humans and Youkai 8.75
Season 2 - Episode 13
Natori tells Natsume of a well near the mansion that holds a group of Oni. They are calling out to any Youkai. He also learns that Kai came down from the mountains to free the Oni. While looking for Kai, Natsume sets off one of Natori's traps in the mansion. Kai saves Natsume and heads off to kill Natori.Natsume follows him,to save Natori from getting killed. After he encounters him, he is forced to make an important decision. Which ones are more important to him? Humans or Youkai?
#12 - The Swallow at the Water Bottom
Season 1 - Episode 6
Natsume gets possessed by a swallow spirit, who wishes to meet a human that helped her before. Natsume agrees to help her and the two grow attached. When Swallow finds the human, Natsume feels bad that she can't actually meet him, but when of he hears of a kimono that can turn a spirit human for a day, he strives to find it...
#13 - Stand-In
Season 4 - Episode 4
Yobiko, a youkai that can imitate the voices of others, sneaks into Natsumes' house and asks him to call out another youkai named Karikami. Long ago, Yobiko had been watching over a woman named Youko who was meeting with a man at a nearby shrine. One day the man stopped coming, due to an arranged marriage to another woman, so Yobiko decided to use his talent to talk to the girl. Eventually, he told her the truth about the man and ran away. When he came back to the shrine many years later, he found an old letter that had been sealed shut and wrinkled. Natsume and Yobiko later meet Karikami and after returning his name, Karikami restores the letter. Unable to read human letters, Yobiko asks Natsume to read it to him. Instead of a hateful message he was expecting, it is actually a letter of thanks for telling her the truth.
#14 - Melting Into Spring
Season 2 - Episode 2
While fooling around in the snow, Natsume and Nyanko-sensei run into Gen, a forest guardian who lives inside a statue. Gen tries to take over Natsume's body, but instead takes over a snow rabbit that Natsume had made. Gen pleads Natsume to help him find an evil spirit who destroyed Sui, his guardian partner, and Natsume agrees. But it seems Gen isn't telling everything he knows...
#15 - Episode 12
Season 5 - Episode 12
#16 - Natsume Captured
Season 4 - Episode 1
Natsume encounters some strange, monkey-mask wearing demons while out in a forest. They want the book of friends, and start physically threatening him until Natsume is saved by Nyanko-Sensei. Later on, Natsume encounters the demons again and is captured by them, and brought to their forest. Meanwhile, Nyanko-sensei learns some interesting things about the forest the monkey mask demons live in. Running away from the demons, Natsume and Nyanko-sensei are unintentionally saved by an exorcist - Matoba! Not wanting to confront him, Natsume runs again but gets lost in the woods, and stumbles upon a house... belonging to the Matoba. Both he and Nyanko-sensei are captured, but manages to escape and find each other, though being lost in the house. The episode ends with Matoba finding Natsume saying, "It's been a long time, Natsume Takashi-kun."
#17 - Five Day Mark 8.75
Season 1 - Episode 12
Natsume is cursed by an evil spirit which is sealed to a tree, not wanting to trouble his adopted family, he decided to run away from home.
#18 - A Place to Go Home To 8.71
Season 3 - Episode 12
Natsume returns home from school one day to realise that Nyanko sensei is not home. Whilst at the window, he sees a yokai that is trying to enter the house whilst calling out his name. Nyanko-sensei comes to the rescue but Natsume falls ill with a fever.
#19 - A Chick Hatches 8.71
Season 2 - Episode 4
Natsume takes care of an abandoned egg from a nest, not considering it could be a Youkai. After it hatches, it turns out it is a rare baby spirit called Tatsumi, who thinks that Natsume is its parent. Natsume can't help but get attached to the little spirit even as Tatsumi grows tired and sick. But as Natsume takes care of Tatsumi, a mysterious spirit comes and wants to take away Tatsumi for his master... who wants to eat him!
#20 - The Moon-Splitting Festival 8.56
Season 4 - Episode 9
Natori is tasked with the job of finding and breaking the seal of Houzukigami, a god that was to participate in the Moon-Splitting Festival done every 10 years against Fuzukigami, another god. The festival is used by the youkai around the mountains to determine whether the harvest would be bountiful that year or not. Without Houzukigami, the match would end in a default win for Fuzukigami, causing the land to become barren. Natori tries to find the seal but is surprised to find Natsume at the festival disguised as Houzukigami, having been asked by Houzukigami's servants to stand in for their god. The match to be the winner is to catch a beast that was released from a pot. Houzukigami's servants tell Natsume to look for the real Houzukigami while they track down the beast. Joined by Natori, Hiiragi, Nyanko-sensei, and one of the servants, they look in a building by a waterfall. The beast suddenly appears and Natsume and Hiiragi are knocked off the deck of the building. After recuperating from being being dragged down the river, they try to run back to the building but are caught in a trap by Fuzukigami's servants which was meant for the beast. While unconscious, one of the servants is able to pick up a human scent from "Houzukigami", making them wonder if it's truly the god or not.
#21 - Youkai Exorcism Amid the Steaming Springs 8.50
Season 2 - Episode 3
Natori invites Natsume on a Hot Spring trip. But noises from the closet and a kimono-clad figure dangled from the ceiling make Natsume uneasy. Not wanting to trouble Natori because of his kind gesture to enjoy the Hot Spring with him, Natsume investigates the Hot Spring himself. During the night Natsume meets with the Youkai, where she comments that he is too soft, and attacks!
#22 - The Door of Memories 8.50
Season 4 - Episode 12
Natsume, accompanied by Nyanko-sensei, set out to visit his old home. He visits a relative to pick up the key to the house, but is being followed by a youkai who wants him to draw a mouth for it. He leads the youkai away from the home of his relatives and Nyanko-sensei drives it away. When the two get back on track to finding the house, Natsume is suddenly attacked by the youkai and becomes lost in old memories.
#23 - Natsume's Book of Play 8.50
Season 3 - Episode 13
It is after exams and Natsume and his friends are planning on what to do for their school holidays. After being unable to come to a decision, the group heads home for the day. Natsume reaches home and is greeted by his relatives before heading into his room. When he enters he is greeted by his Yokai friends who constantly disturb him and they have invited him to attend a Dog Party with them.
#24 - The Gap Between Humans and Youkai 8.50
Season 4 - Episode 7
Natsume is saved by Tanuma and the two escape from the banquet hall with the help of Natori, who was disguised as a youkai. Tanuma is drawn more into the world of the youkai and experiences it first-hand, which greatly worries Natsume. Blood marks are found all around the mansion and Natsume's fears come true when Tanuma is attacked by Omibashira, but is protected by a stone Natori gave him. After Natsume helps Natori seal Omibashira everyone is able to escape the previously sealed exits. Promising Tanuma that he'd tell him his complaints at school the next day, Natsume finally arrives back home.
#25 - Ayakashi Purification 8.45
Season 1 - Episode 9
Natsume meets a popular actor named Natori Shuuichi who can also see spirits, and has a side job as an exorcist.