Two of the stories in the manga were adapted into an experimental anime series titled the Lion Books collection.

The original concept was to make 26 new anime episodes and canvass them for sale without any broadcast contract with TV stations.

It is regarded as the first attempt to produce an original video animation release on October 10.

The Green Cat is known to be screened in the "4th Tezuka Osamu Fan Club Meeting" on October 10 of the same year.

[2] The second story "Adachi-ga Hara" was adapted in 1991, and became the only film in the series to be released to theaters.