Lost anime pilots from the 60's-70's

I am ABSOLUTELY into this!

Edit:
Oh god the translation on the website is terrible! Either way though the website actually has some really interesting information, or I guess content in general.

Im just returning to this sight after a year or two hiatus, in the mean time iv been looking into a lot of older anime and older English dubs. 80's and 90's Japanese exclusives back in the day and vintage fan projects. The hardest thing with finding Japanese exclusive shows is language barriers and fans tend to keep more in private collections. Torrents are a pain to look for and find. I have a long list of interesting topics but no evidence its exactly lost or just hard to find. There where 100's of very small print releases of anime. Reels transferred on tape for fan circles to share.

Any ways the pilot from the website 
"Spaceship Red Shark" As the site is translated lol Is really interesting because only a pitch reel is out and was meant to be the first color cartoon produced and aired in Japan. 

The website seems to still be some what updated, I would ask the owner what the know a little bit more about the releases or possibility of these shows existing. Even if they could enlighten us on any popular lost Japanese anime besides Old-Doreamon.

Looking through websites I found a book on google that mentions a All-Purpose Rabbit Anime that aired, and i cannot find anything at all about this anime. Its made from a UFO exclusive plush toy I'm a fan of...

Finding Japanese lost media is tricky considering you need somebody on-board who understands the language enough to be thorough and search properly. While my reading ability isn't the greatest, I could do some searching in Japanese and see what I find!