With a little bit of digging on ancestry.com I have been able to determine the surname is Hara, see attached census record from 1930 which mentions both Buichi and Kanayo.
Ask an expert about your family tree
Want to dive deeper into your family tree? Begin with a free quote for a family history research package offered by Legacy Tree - an independent genealogy service.
BillionGraves.com record for Kanayo Hara (8 August 1893 - 14 November 1971), BillionGraves Record Hanapepe Japanese Cemetery, Hanapepe, Kauai, Hawaii, United States, North America