The 31st year of the Showa Era (1956) marked the tenth year since Japan's defeat in World War II. It was when Japan took its first step out of post-war poverty to rejoin the international community. In old downtown Tokyo, a teacher and her students try to pass down Doyo (Japanese traditional children's songs) as the root of Japanese cultural identity to the future generations.

Naoya Sekine
as Akira Yanagizawa (voice)

Subaru Kimura
as Gonji Abe (voice)

Maika Kawaguchi
as Shizu Miyanaga (voice)

Sayaka Hanamura
as Rieko Sakamoto (voice)

Eri Osonoe
as Yayoi Tajima (voice)

Tetsuya Kannami
as Teru Yoshimura (voice)

Kurumi Honta
as Kimiyo Arima (voice)

Seigo Kuwabara
as Yoshio Kawabata (voice)

Hikari Yono
as Fukuko Yanagizawa (mother) (voice)

Kanon Nagashima
as Reiko Yanagizawa (voice)