From Wikipedia:

Kintsugi, also known as Kintsukuroi, is the Japanese art of repairing broken pottery with lacquer dusted or mixed with powdered gold, silver, or platinum, a method similar to the maki-e technique. As a philosophy, it treats breakage and repair as part of the history of an object, rather than something to disguise.

As a philosophy, kintsugi can be seen to have similarities to the Japanese philosophy of wabi-sabi, an embracing of the flawed or imperfect. Japanese aesthetics values marks of wear by the use of an object. This can be seen as a rationale for keeping an object around even after it has broken and as a justification of kintsugi itself, highlighting the cracks and repairs as simply an event in the life of an object rather than allowing its service to end at the time of its damage or breakage.