Which anime was not based on manga or light novel originally?

According to the information provided, there was no clear answer. Please provide more detailed information.

It's hard to give an exact percentage. But a significant number of anime are original creations or adaptations from light novels, video games, or other sources.

Some examples include 'Avatar: The Last Airbender' and 'Steven Universe'. They have original storylines not derived from manga or light novels.

'Neon Genesis Evangelion' is an example. It has its own original storyline and concept that isn't derived from a manga. The series is renowned for its complex themes and deep character development.

Haikyuu was originally a manga. It gained popularity through its engaging story and art in that format.

Log Horizon anime is based on a light novel. The original story originated from the light novel series.

One characteristic is that they often have more freedom in storytelling. For example, 'Psycho - Pass' was an original anime. Without the constraints of adapting a pre - existing work, it could create a complex and unique world with its own rules regarding the Sibyl System. It didn't have to worry about staying true to a manga or light novel's plot, so it could take risks and be more experimental.

The Log Horizon anime is derived from a light novel. The light novel offers detailed world-building and plotlines that are adapted for the anime. While some elements might be slightly modified for the animation, the core comes from the light novel.

Well, 'Steven Universe' is one such anime that isn't based on manga. It has a unique world and character development created specifically for the show. Another one is 'Adventure Time', which has its own distinct and imaginative universe that isn't sourced from manga.

One such anime is 'Neon Genesis Evangelion'. It has an original story and is not adapted from a manga.