A mountain or a waterfall are lucky images, while a sunset or an autumn landscape, with fallen leafs, are considered to bring bad luck for a sentō...
But which image would be the most auspicious? That, of course, is the Mount Fuji... painted with a blue sky, with fluffy clouds, with its snow covered cone and seen from the lake... well, that will bring good luck and prosperity...
And if you think about it - that's a powerful, relaxing painting - the customers will enjoy it, will come back to the same sentō and that, of course, will mean prosperity for its owner...
EXIF info:
Nikon D80
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/5.6
Shutter Speed: 1/50s
ISO Sensitivity: ISO 400