Japanese themed skybox.
Gfycat 360 - https://gfycat.com/DimpledInfiniteAlbacoretuna
Mt Fuji is located roughly to the west (left in Hammer's top down view) with the lighting to the south.
There is no painted sun, just subtle lighting on the clouds and Mt Fuji so you should be able to have a really broad range of options over the exact positioning of your sun due south.
Use with credit
If your map goes official I'll settle for 90% of revenue tyvm