1970s Japanese poster design

I wish I could tell you more about this one. I pulled this out of a book I have on 70s + 80s Japanese graphic design. All the text is in Japanese so, I have no clue on who designed this. Anyone recognize this work? I have no idea why theres a gaggle of balloon animals chillin in a tree. If someone could translate the text below the animals, that would be great.

Tags1970s, animals, graphic-design, japan, out-of-print, posters, trees