That "loosely" hides a bit of a tragedy on the Studio Ghibli adaptation: instead of accepting the transcendent Hayao Miyazaki work that she and we all deserved, she refused what she misunderstood would be a Disney-like cartoon...

And instead of this, much later, the not-at-all ready son, Goro Miyazaki, had a go without having done the massive thought-work that you can for example glimpse Hayao doing on the emotional arc of Ponyo