I think passports should not even have a place of birth field to begin with as I see it to be irrelevant.
Take the US passport as an example: Does this mean that if a US citizen is not born in the US is considered to be second class citizen?
In most countries, the country of citizenship has nothing to do with where you are born but on your parents citizenship at the time of your birth.
Note: Japanese passports list "place of domicile" which is not necessarily your place of birth. Swiss passports list "place of origin".