Cast
Kappa of Kitakamigawa: Takeshi Tomizawa (Toaru Hikuushi e no Tsuioku)
Kappa of Toyosawagawa: Mikio Date (Chieri to Cherry)
Kappa of Mabechigawa: Shouhei Uno
Zachiki-warashi: Sally Amaki (22/7)
Staff
Monster Character Design: Takumi Tanji (Kimi no na Wa. art director)
Character Design, Chief Animation Director: Hiroshi Shimizu (Megalo Box)
Art Director: Yuuki Hatakeyama (Levius)
Color Design: Aiko Mizuno (Hataraku Saibou (TV))
CG Director: Shinya Takano (3-gatsu no Lion)
Director of Photography: Arimasa Watanabe (Planetarian: Chiisana Hoshi no Yume)
Editing: Mai Hasegawa (Sakurada Reset)
Sound Director: Eriko Kimura (Penguin Highway)
Sound Production: Tohokushinsha
General Producer: Yukiko Takase (Great Pretender chief producer)
Producers: Taku Matsuo (Koi wa Ameagari no You ni), Yoshinori Takeeda (Beastars), Noriko Iwasaki (Bakuten!!)
Shinya Kawatsura (Non Non Biyori) is helming the anime at David Production, and Reiko Yoshida (Kimi to, Nami ni Noretara) is penning the screenplay. Yuuri Miyauchi is composing the music.
Trailer 2
Source: Comic Natalie