Collaborations between Takeshi Seyama and Keiko Niwa
| Film Title | Year | Takeshi Seyama | Keiko Niwa |
|---|---|---|---|
| When Marnie Was There | 2014 | Editor | Writer |
| From Up on Poppy Hill | 2011 | Editor | Writer |
| The Secret World of Arrietty | 2010 | Editor | Writer |
| Tales from Earthsea | 2006 | Editor | Writer |