I wouldn’t set one net-yield hurdle from these numbers alone. Start with the annual gross rent of ¥12,672,000, then run three cases: expected occupancy and costs, a turnover year, and a year combining vacancy with the larger repair. Add property tax and insurance from property-specific quotes...
Agreed. Floor area might help separate similar units, but only if the field is consistently completed. If one advert omits it and another uses a different description, the apparent duplicate problem becomes harder to untangle.