5 user 7 critic

The Perfect World of Kai (2007)

Piano no mori (original title)
Two different people - the son of a prostitute, and the son of a professional musician - develop a bond of friendship through their love of playing the piano.


Masayuki Kojima


Ryûta Hôrai (screenplay), Makoto Isshiki (manga)
2 nominations. See more awards »




Credited cast:
Aya Ueto ... Kai Ichinose (voice)
Ryûnosuke Kamiki ... Shuhei Amamiya (voice)
Rest of cast listed alphabetically:
Hiroyuki Amano Hiroyuki Amano
Mayuko Fukuda ... Takako Maruyama (voice)
Chizuru Ikewaki Chizuru Ikewaki ... Reiko Ichinose (voice)
Kazuko Kurosawa Kazuko Kurosawa
Rica Matsumoto
Hiroyuki Miyasako Hiroyuki Miyasako
Udo Suzuki Udo Suzuki
Junji Takada Junji Takada
Atsuko Tanaka
Mayumi Tanaka


Amamiya Shuuhei moves from Tokyo to the country side due to his grandmother's bad health. His father is a famous pianist and Shuuhei has taken strict piano lessons since he was very young, aspiring to follow in his footsteps. In school, he is teased by his classmates and is dared to play the piano in the forest. This piano is said to be cursed: if you play it, no sound will come. After school, Ichinose Kai, a boy in the same class, takes Shuuhei to the forest. When Shuuhei tries to play he fails, but Kai plays a wonderful song. This is the beginning of a strong friendship, and a story of two very different boys developing their skills as musicians. Written by Anonymous

Plot Summary | Add Synopsis


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Did You Know?


Remade as Forest of Piano (2018) See more »


Sung by Nao Matsushita
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User Reviews

An Inspiring and warm movie
25 February 2008 | by webb_lordSee all my reviews

A fantastic movie about piano playing and friendship.

Don't get it wrong thinking you won't like it because your not interested in pianos cause i ain't and i still loved it. Mainly its about 2 boys one rich from the the capital Tokyo and one poor from what we could call the city slums of a smaller town, they become very good friends and find out that they both love the same thing "to play the piano" and they're both trying really hard to become better before a big competition which selects the best pianist in all of Japan

Can't really explain it but there is something in this movie that you don't see much in movies these days something different, slightly mystic fantasy about it may be a way to put it. And then we have the Friendship and warmth which the movie is based on and if you put it together well See it and you'll know what i mean.

Regards Your Hottentott

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Official Sites:

Official site [France]





Release Date:

21 July 2007 (Japan) See more »

Also Known As:

Piano Forest See more »


Box Office

Cumulative Worldwide Gross:

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Company Credits

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Technical Specs

Sound Mix:

Dolby Digital



Aspect Ratio:

1.85 : 1
See full technical specs »

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