Anpanman is known as a popular anime series that has been on the air since 1988 and is still airing today, and a pilot was produced one year before its first airing. However, no images or other document of the pilot are online and only scant detail can be found.
Anpanman was sculpted differently from today, being taller and having a bigger face and being able to fly with Uncle Jam on his head.
The pilot was not released because creator Takashi Yanase complained about Anpanman's modeling.
The animation produced by Ajia-do Animation Works.
Anpanman was voiced by Fushigi Yamada.
It was once shown on the July 29, 2008 episode of the news program Sukkiri, when it featured Anpanman.
If you do a search about the Anpanman pilot, you will find this video, but this is not the pilot. It was produced as part of a series of short anime films based on picture books called the Tanoshī Ohanashi Series (たのしいおはなしシリーズ), and has been properly released. Animation production is by Märchen-sha.