Found at the link posted prior - under “Early Life and Education”
“Raised in Honolulu, Hawaii, Hirono became a naturalized U.S. citizen in 1959, the year that Hawaii became a state.[9]”
This one statement is all that was found. Her permanent records and credentials as sketchy as BO’s were. Neither is NBC
Citizenship in Hawaii was always a little sketchy, as we found when researching Obama. They had this rule that the mother could not confer citizenship on her child if she was under a certain age and married to a non citizen. I suspect that Hawaii just took in everyone who was there at the time — citizen, or not — and conferred citizenship on them.