Tree of Promise


Yakusoku no Ki
Air Date February 2, 2009
Episode 18
Adapted From Special 06
Opening Song Ano Hi Time Machine
Ending Song Aishiteru
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Tree of Promise is the eighteenth episode of the Natsume Yuujinchou anime. It first aired on February 2, 2009. It is the fifth episode for Zoku Natsume Yuujinchou, which is the second season of the anime.


Natsume encounters a spirit who was "enslaved" by his grandmother Reiko 50 years ago by writing his name on a torn page from the Book of Friends, and tying it to a tree in a forest.

He has been searching for it for years, but the spirit hasn't found it yet. Can Natsume help locate this torn page? What was Reiko's true intentions in tying it high above in a tree?

Natsume is standing at the end of a bridge with his classmates, Kitamoto and Nishimura. They tell him he looks sick when he spots a little green-haired boy standing in the middle of the bridge. The boy runs away after Natsume and his friends look down the bridge.

Natsume is checking his temperature at home and finds out he is sick. The little green-haired boy is seen outside the window and Natsume brings him in to talk. The boy whose name is Kirinoha, doesn't talk until Nyanko-sensei yells at him behind.

Kirinoha explains that 50 years ago, he met Reiko and asked her about the ocean. After claiming his name, Reiko ties the contract high up a tree, telling Kirinoha that if he tries to get it before 50 years time, the world will be destroyed.

Natsume, Madara and Kirinoha search for the contract in the forest. Tanuma helps along with Jun, Satoru and Atsushi though they don't know it belongs to a youkai apart from Tanuma. Hinoe also shows up after hearing about it when Natsume collapses soon after.

Natsume's friends say goodbye to Natsume's mother after dropping him off by the house. While Hinoe is looking after Natsume, Kirinoha blames himself for Natsume's sickness. Hinoe tells him to not put Natsume's efforts to waste, remembering how Reiko used to be reckless too.


  • The story of Kirinoha only occurs in the anime, while the part when Hinoe telling the others about her first meeting with Reiko was adapted from Special 6 in Volume 6 of the manga series.

Characters in Order of Appearance



1st Season Zoku Natsume Yuujinchou 3rd Season
Episode 14Episode 15Episode 16Episode 17Episode 18Episode 19Episode 20Episode 21Episode 22Episode 23Episode 24Episode 25Episode 26