山紫水明
san.shi.sui.mei

Literally: mountain – purple – water – bright

Alternately: The purple color of mountains reflecting sunlight and the clarity of (mountain) streams or lakes. This phrase suggests the purity and beauty of natural landscapes in general. “Nature is pretty.”

Notes: This phrase was taken from one of the poems of Edo-era writer Rai Sanyou.

The irony being that the water in that rice field, while very pretty, is full of mud and all sorts of little animals. Source.