The voice actors for the characters in the movie [君たちはどう生きるか](javascript:void(0)) (How Do You Live?) are as follows:
- 牧眞人 (Mahito Maki): 山時聡真 (Soma Santoki)
- 勝一 (Shoichi, the father): 木村拓哉 (Takuya Kimura)
- 夏子 (Natsuko, the mother): 木村佳乃 (Yoshino Kimura)
- 青サギ・サギ男 (Blue Heron / Sagi Otoko): 菅田将暉 (Masaki Suda)
- ヒミ (Himi): あいみょん (Aimyon)
- キリコ (Kiriko): 柴咲コウ (Ko Shibasaki)
- 大伯父 (Great Uncle): 火野正平 (Shohei Hino)
- インコ大王 (Parakeet King): 國村隼 (Jun Kunimura)
- 老ペリカン (Old Pelican): 小林薫 (Kaoru Kobayashi)
- ワラワラ (Warawara): 滝沢カレン (Karen Takizawa)
- あいこ (Aiko): 大竹しのぶ (Shinobu Otake)
- いずみ (Izumi): 竹下景子 (Keiko Takeshita)
- うたこ (Utako): 風吹ジュン (Jun Fubuki)
- えりこ (Eriko): 阿川佐和子 (Sawako Agawa)
This prestigious cast was specially selected for the film, with some voice actors like 木村拓哉 having previous experience in studio Ghibli films such as "Howl's Moving Castle." The cast was kept under wraps until the film's release, making the unveiling a major talking point. The roles of major characters like Mahito and Shoichi were given to young debut actors and seasoned professionals, respectively, to bring depth and authenticity to the film's story about life and growth.