Okinawa Genealogical Society of Hawaii (OGSH) in Hawai‘i and Okinawa Prefectural Library launched a service to help individuals to find the roots of their ancestors.
C/O Hawaii United Okinawa Association
94-587 Ukee Street
Waipahu, HI 96797 USA
Phone: 808-676-5400 (country code +1)
Okinawa Prefectural Library's First Generation Immigration Genealogical Reference Service
The Hawai'i Collection in Hamilton Library has a list of useful directories for those who conduct general genealogy research.
"GENEALOGY: Ethnic Hawaii Genealogy Resources: Okinawan": https://guides.library.manoa.hawaii.edu/c.php?g=105229&p=684160
The page above is created and maintained by the Hawai'i Collection Librarians. The list includes the important published directories related to Okinawans in Hawai'i.