I watched Ponyo, one of Japanimation made by Ghibri studio.
** This article has many spoilers **
I like to share why I found the animation was so interesting.
Ponyo and ponyo-shaped-friends are analogy to a baby and sperms, respectively. Ponyo passes through a dark tunnel and gets into a transparent egg shaped room, which implies that a baby is carried to a mom's egg.
Not everything are exactly mapped to the process of delivering a baby but some are added to make the analogy complete and some are exaggerated.
The animation shows that Ponyo's visiting is causing a lot of troubles: the moon is falling down, ships are missing, and an entire city is submerged. This is very exaggerated but probably almost same level of troubles will be expected in a family once a baby is delivered or being delivered.
The protagonist boy was too smart to be 5 years old boy. Five years old is obviously too early to take a responsibility of having a baby but who on the Earth will be fully ready to have a baby.
By showing ancient fish, it reminded that human species is also from sea and shares many parts on DNA. Who would easily connect dots between delivering a baby with ancient fish.
Ponyo was crossing the line between the world of magic and that of real. I thought this point of view was very romantic.
I didn't find any political factors in this animation but there was a number "1907" on a door. I am guessing that there might be some events in the year.