An aesthetic value originating in 15th century Japan with roots in Zen Buddhism.  It acknowledges the beauty in imperfection, impermanence and natural simplicity.  Another way to observe it is an acceptance that nothing lasts, nothing is finished and nothing is perfect.  The philosophy originated by appreciating these qualities in the ordinary dwellings and objects of pheasants.  The simple design of their belongings could be seen to change appearance over time by the forces of nature resulting in fading, cracking, warping, rusting and the like.  In this way, nature continually renders our objects regardless of their original design.  This contrasted to the symmetrical, ornate and polished aesthetic created by master artists and craftsmen of the day, curated and carefully preserved by their patrons.  Eventually, the ruling class adopted the wabi-sabi aesthetic in art, ceramics, gardens, architecture, crafts, flower arranging, and the tea ceremony.    

Raku ceramics emerged during this period and reflected the wabi-wabi aesthetic in that it: defies mastery,  acknowledges that not all of the variables present during the Raku firing process can be controlled, and challenges the artist to reconcile her intention with with the result of the firing.  The Raku fire is a natural rendering process akin to weathering, but takes place in a much shorter time frame.