Wabi-sabi is a visual of Japanese world,based on the transience of the things. Wabi-sabi is also described as ”beautiful imperfect”,and it is close to Buddhism and to his anitya.
Wabi today identified the rustic simplicity, freshness or silence, and can be applied to both natural and artificial objects, or understated elegance.
Sabi is beauty or serenity that accompanies advancing age, when the life of the object and its impermanence are highlighted by patina and wear, or any visible repairs.
This source in in italian.