This engaging series of childhood recollections tells of an unconventional school in Tokyo during World War II that combined learning with fun, freedom, and love. The school had old railroad cars for classrooms and was run by an extraordinary man – its founder and headmaster, Sōsaku Kobayashi – who deeply valued children's independence, and who was a firm believer in freedom of expression and activity.
| Directing | Shinnosuke Yakuwa | Director |
| Writing | Shinnosuke Yakuwa | Screenplay |
| Visual Effects | Shizue Kaneko | Character Designer |
| Sound | Yuji Nomi | Original Music Composer |
| Writing | Yosuke Suzuki | Co-Writer |
| Production | Tetsuko Kuroyanagi | Executive Producer |
| Sound | Aimyon | Theme Song Performance |
| Art | Takuya Wada | Art Designer |
| Art | Kyoko Yauchi | Art Designer |
| Art | Tatsuya Kushida | Art Direction |
| Visual Effects | Sanae Matsutani | Color Designer |
| Camera | Kentaro Minegishi | Director of Photography |
| Editing | Toshihiko Kojima | Editor |
| Sound | Yoji Shimizu | Sound Director |
| Sound | Shizuo Kurahashi | Sound Effects |
| Sound | Sachiko Nishi | Sound Effects |
| Visual Effects | Takuya Wada | Animation Director |
| Visual Effects | Shizue Kaneko | Supervising Animation Director |
| Visual Effects | Yuko Kato | Animation Director |
| Visual Effects | Chie Mishima | Animation Director |
| Visual Effects | Kazuhiko Yabumoto | Animation Director |
| Visual Effects | Atsushi Tamura | Animation Director |
| Visual Effects | Takayo Nishimura | Animation Director |
| Visual Effects | Kaori Hayashi | Animation Director |
| Visual Effects | Masaru Ooshiro | Animation Director |
| Visual Effects | Takuya Wada | Key Animation |
| Directing | Yoshihiro Osugi | Second Unit Director |
| Directing | Kazuhiko Yabumoto | Second Unit Director |
| Directing | Takuya Fujikura | Second Unit Director |
| Directing | Reina Tanaka | Second Unit Director |
| Writing | Tetsuko Kuroyanagi | Novel |
| Visual Effects | Takayo Nishimura | Key Animation |
| Visual Effects | Atsushi Tamura | Key Animation |
| Visual Effects | Takayuki Uragami | Key Animation |
| Visual Effects | Masayuki Yoshida | Key Animation |
| Visual Effects | Aya Suzuki | Key Animation |
| Visual Effects | Sawako Miyamoto | Key Animation |
| Visual Effects | Kumiko Kawana | Key Animation |
| Visual Effects | Hiroko Minowa | Key Animation |
| Visual Effects | Saka Ikeda | Key Animation |
| Visual Effects | Shingo Takenaka | Key Animation |
| Visual Effects | Masahiro Sato | Key Animation |
| Visual Effects | Shingo Okano | Key Animation |
| Visual Effects | Yuko Tagawa | Key Animation |
| Visual Effects | Emi Matsunaga | Key Animation |
| Visual Effects | Michio Mihara | Key Animation |
| Visual Effects | Misato Kishino | Key Animation |
| Visual Effects | Kazunori Minagawa | Key Animation |
| Visual Effects | Ikuno Yagi | Key Animation |
| Visual Effects | Yuka Hara | Key Animation |
| Visual Effects | Tetsuro Kaku | Key Animation |
| Visual Effects | Saori Koike | Key Animation |
| Visual Effects | Yuko Kato | Key Animation |
| Visual Effects | Shinichiro Yamada | Key Animation |
| Visual Effects | Masahito Sawada | Key Animation |
| Visual Effects | Shigeru Kimishima | Key Animation |
| Visual Effects | Mai Tsutsumi | Key Animation |
| Visual Effects | Kanae Miya | Key Animation |
| Visual Effects | Kazuhiko Yabumoto | Key Animation |
| Visual Effects | Saeko Ozawa | Key Animation |
| Visual Effects | Hitomi Aso | Key Animation |
| Visual Effects | Hirofumi Masuda | Key Animation |
| Visual Effects | Kouichi Arai | Key Animation |
| Visual Effects | Yoshihiro Osugi | Key Animation |
| Visual Effects | Takuji Mogi | Key Animation |
| Visual Effects | Mei Nishiyama | Key Animation |
| Visual Effects | Lin Kewei | Key Animation |
| Visual Effects | Hatsumi Kamigai | Key Animation |
| Visual Effects | Masayuki Kouda | Key Animation |
| Visual Effects | Yukari Kaku | Key Animation |
| Visual Effects | Kaori Matsushima | Key Animation |
| Visual Effects | Keisuke Hiroe | Key Animation |
| Visual Effects | Yuichiro Sueyoshi | Key Animation |
| Visual Effects | Yumi Chiba | Key Animation |
| Visual Effects | Hiroyuki Horiuchi | Key Animation |
| Visual Effects | Junichi Takaoka | Key Animation |
| Visual Effects | Juuji Mizumura | Key Animation |
| Visual Effects | Yoshinobu Ando | Key Animation |
