Puerto Rican was coded as white for Fed stats. According to the Fed manual, Korean was likely coded as “other non-white”. I don’t have the answer for you as to why the Feds did it that way, except that this is for race, not nativity. Spanish, Puerto Ricans, etc. are considered Caucasian.
I'm saying that I believe the Hawaii state codes include statistical codes for Korean and Puerto Rican. And it is possible this table from the state of Hawaii reflects those codes.
We know for certain that the Hawaiians code for Caucasian is 1, if that is a 2 and not a 7, then 2 is Hawaiian and 3 is part-Hawaiian. So the first three entries on the table match what would be Hawaiian coding scheme.
The only question is do the other races listed in the table line up.
A copy of Virginia Sunahara's death certificate should list her race (Japanese/Korean). I wonder if they code those.
http://www.wnd.com/files/2012/09/SUNAHARA-short-form-COLB.jpg