Isn't there some Japanese actuary table we could consult?
Well I also think 53 kg is too much for 157, especially considering the fact that Japanese girls are petite in build. For petite gals OK weight for that height would be 41 - 46, anything above is not considered petite anymore.
I honestly doubt J-girls are 53 kg cause they were all very very skinny back then when I visited Japan for a short period. I would give them no more than 45 kg. I know cuz I'm Latina and our girls are similar height but with much more curves and weight.
When I came to japan, I was quite fat:157cm/57kg
Now I'm 157/43, and people envy me, and find me very attractive.
However, I have heartburn and bulimia, I throw up after every meal, and sometimes between, and overuse laxatives. Several days ago I stretched my knee when I overexecised.But nobody knows it.Everyone says: "Oh, T, you are so slim and beautiful!"
If anyone wants to be 43 kg, I can give them the exact recipe.But she'll end up like me.