It would seem that a combination of the Vienna model, with mandatory use of a post-arrival tracking and contact tracing app (that everyone in the tourist industry would also use but just while on the job, and optionally by all residents when in public areas) would do the trick. And if you don’t do both, 14 day guarded quarantine or fly back immediately. The added cost and complexity imposed would track to the desire to up-level the tourist demographic as well. The Japanese tourists would have no problem with this and would be very assured by it.
If our islands could really become and remain nearly covid-free for the next 2 years, and if life can approach pre-covid in a way not possible anywhere that lacks a 2500mi ocean moat, that could be a strong differentiator. Kauai seems to be there, and the others are getting close.