FSX/P3D. Japanese developer WingCreation has just released their Nagasaki project and it's now available for purchase. I personally recommend doing some major research and comparisons with the PacSim Nagasaki variant just released a few weeks back prior to purchase as currently, the price difference is about $10 bucks with WC being on the more expensive end of the price spectrum. Congratulations to WingCreations for another release! Now available via the source link below.
Now Available For USD - $32.24!