12-year-old Oriko Seki, who lost her parents in a car accident, ended up living in her grandmother's Onsen Ryokan "Haru no Ya." With the ghost "Uribou" cohabitating with her and all the other odds, she ended up training to be a young female innkeeper. At first, she didn't like the training, but gradually felt her admiration for her title and began to train seriously. Thus, the growth of the young warrior Oriko begins.
Unfortunately the movie Okko's Inn is not yet available on HBO Max.
| Art | Kosuke Hayashi | Background Designer |
| Art | Youichi Watanabe | Art Direction |
| Visual Effects | Hiroko Minowa | Key Animation |
| Visual Effects | Kumiko Kawana | Key Animation |
| Sound | Sachiko Nishi | Sound Effects |
| Sound | Shizuo Kurahashi | Sound Effects |
| Sound | Masafumi Mima | Sound Director |
| Sound | Sayaka Ninomiya | Sound Mixer |
| Sound | Keiichi Suzuki | Original Music Composer |
| Camera | Michiya Kato | Director of Photography |
| Visual Effects | Terumi Nakauchi | Color Designer |
| Visual Effects | Shoko Nagasawa | Key Animation |
| Visual Effects | Takeshi Honda | Key Animation |
| Visual Effects | Shinji Otsuka | Key Animation |
| Editing | Kashiko Kimura | Editor |
| Visual Effects | Shunsuke Hirota | Animation Director |
| Writing | Reiko Yoshida | Screenplay |
| Writing | Asami | Comic Book |
| Writing | Hiroko Reijou | Comic Book |
| Directing | Kitaro Kosaka | Director |
| Editing | Takeshi Seyama | Editor |
