Japanese manga are read by many adults.
It is reason why Japanese people read a manga.
One of the reasons is the high quality of manga.
Although there are manga for children, there are manga for adults.
Manga for adults is rather than unskilled novel.
And they are very philosophically.
For example I cite the jojo part 6.
In part 6, enemy is the father Ptti (Ptti comes from brand) and his faculty is to accelerate the time and coming back the universe, and his faculty (stand) is named made in heaven (it comes from rock music).
His motivation to use this faculty or skill is to make all mankind go up to the heaven.
He searched the method where all mankind goes up to the heaven.
Note that pearly gates or heaven in this manga does not mean usual pearly gates.
It does not mean the heaven when one died, it means more realistic one.
This heaven means the heaven that is to be reached splits livingly.
DIO thought the method and write it one note.
But DIO is killed, he extract the memory of the hero of part 3.
This story is beyond the good and evil dualism.
He knew the method after using made in heaven, and he say to go to the heaven is to be prepared, it is not to be resigned.
After coming back universe, all mankind know what happen in future.
All but not one people know future.
For example, one knows when one encounters accident and when divorce and when die.
He says that to know worth thing may be connect resigned, but it is incorrect.
He strongly says that to be prepared is really heaven.
Otherwise his thought is right or incorrect, his motivation is very religious and he thinks all the mankind.
The hero of the part 6 is a girl and she battle Ptti to get the memory of her father back.
Because if her father’s memory is not recovered her father die.
Although she thinks only one parson (her father), the father Ptti thinks all the mankind.
The theme of jojo is human paean.
So there are many battles of goodness vs. goodness.
I think the idea of goodness was produced by humankind, so the idea of goodness or many ideas does not exist really.
In the jojo such that idea may be written.