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Synopsis
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.
Title | Summer Days with Coo |
Companies | SKY Perfect Well Think, Sony Music Entertainment, TV Asahi, Shochiku, dentsu, Shin-Ei Animation, Dentsu Tec, Mitsui & Co. |
Countries | Japan |
Keywords | river, swimming, adult animation, sumo, back in time, corrupt official, kappa |

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)Nanako Hirata
Koichi's Classmate (voice)
Kyousuke Ikeda
Koichi's Classmate (voice)Kazuki Matsuoka
Koichi's Classmate (voice)Souta Murakami
Koichi's Classmate (voice)Saki Yoshihara
Koichi's Classmate (voice)Kereo Yoshita
Koichi's Classmate (voice)