Analysis of information sources in references of the Wikipedia article "下川凹天" in Chinese language version.
Together with Oten Shimokawa, whose 1917 "Imokawa Mukuzo, The Janitor" is thought to be the first commercial Japanese animated film, Kouichi and Kitayama are considered "fathers of Japanese anime", said National Film Center researcher Yoshiro Irie.
|url-status=和|deadurl=只需其一 (帮助)世界上第一部动画《滑稽脸的幽默相》(Humorous Phases of Funny Faces)(1906)
Together with Oten Shimokawa, whose 1917 "Imokawa Mukuzo, The Janitor" is thought to be the first commercial Japanese animated film, Kouichi and Kitayama are considered "fathers of Japanese anime", said National Film Center researcher Yoshiro Irie.
|url-status=和|deadurl=只需其一 (帮助)世界上第一部动画《滑稽脸的幽默相》(Humorous Phases of Funny Faces)(1906)
|magazine=与模板{{cite journal}}不匹配（建议改用{{cite magazine}}或|journal=） (帮助);