It depends on the details and the current situation of the vacant house, but one of the ways to utilize vacant houses is for owners or organizations to rent them out as vacation homes for private stays or other purposes.
When renting out a vacation home for short-term rentals or for overnight stays, you need to let your guests know that your property exists and that it is attractive.
In Japan, there are so many vacant houses that it has become a social problem. Therefore, it is highly likely that the government, which has jurisdiction over the location of vacant houses, will actively consult with you to help you make the most of them.
In the U.S. and other countries, the business of renting out houses to third parties is being actively pursued. In Japan as well, there is a possibility that the number of operation and management companies that rent out buildings, including vacant houses, to third parties as vacation homes will increase in the future. It is a good idea to consult with such specialized companies about the utilization of vacant houses.