

2007·Animation·2h 18m
7.1
★





A small, lone Kappa miraculously survives over 200 years into modern day Japan, when he is found by young Koichi. Coo, who is secretly adopted by Koichi's family, searches with his new human friend for unpopulated places in hopes of finding any remaining of his kind.
Directed by Keiichi Hara
river
swimming
adult animation
sumo
back in time
corrupt official
anime
kappa

Trailer

IMDB
N/A
Where to Watch


Cast

Kazato Tomizawa
Coo (voice)

Takahiro Yokokawa
Kouichi Uehara (voice)

Naoki Tanaka
Yasuo Uehara (voice)

Tamaki Matsumoto
Hitomi Uehara (voice)

Ken'ichi Nagira
Coo's Father (voice)

Kyousuke Ikeda
Koichi's Classmate (voice)

Naomi Nishida
Yukaki Uehara (voice)
Crew

Keiichi Hara
Director

Keiichi Hara
Screenplay

Kei Wakakusa
Original Music Composer

Tomohisa Shimoyama
Key Animation

Tomotaka Shibayama
Key Animation

Takaharu Ookuma
Key Animation

Ryotaro Makihara
Key Animation
Popular Reviews
26 reviews
Giu
9.0★ · 01/30/26

" Coo , were you born over 200 years ago? "
" 😦 "
" Samurai sword? "
" 😰 "
watching a lonely kid slowly open up thanks to an odd little kappa feels less like a fantasy and more like remembering what summers used to be: long days , small discoveries , quiet joys , and moments of hurt that feel enormous at that age.
what I love most is how soft everything is , the pacing , the colors , the way emotions are allowed to sit without being explained or exaggerated.
It’s not about spectacle or big lessons , but about connection , empathy , and learning to care for something fragile , even when you don’t fully understand it.
by the end , it left me with that bittersweet feeling only certain childhood films manage to capture , the sense that something important has passed , but it shaped you in ways you’ll carry forever.
" Coo , were you born over 200 years ago? "
" 😦 "
" Samurai sword? "
" 😰 "
watching a lonely kid slowly open up thanks to an odd little kappa feels less like a fantasy and more like remembering what summers used to be: long days , small discoveries , quiet joys , and moments of hurt that feel enormous at that age.
what I love most is how soft everything is , the pacing , the colors , the way emotions are allowed to sit without being explained or exaggerated.
It’s not about spectacle or big lessons , but about connection , empathy , and learning to care for something fragile , even when you don’t fully understand it.
by the end , it left me with that bittersweet feeling only certain childhood films manage to capture , the sense that something important has passed , but it shaped you in ways you’ll carry forever.
klarouxe
7.0★ · 01/12/26

mimi comme tout (à part le début)
mimi comme tout (à part le début)
salomé
2.0★ · 03/25/25

TRAUMATISME
TRAUMATISME
Jacob Sternitzke
6.0★ · 06/10/24

cute but that’s it
cute but that’s it
Anna
10.0★ · 04/25/26
