|(image from here)|
The understanding of this is part of kintsukuroi.
So is the actual art of repair with gold or silver lacquer.
More mending: this tea bowl (16cm diameter; image from here) was made in the 15th century and repaired (yobitsugi repairs) with 18th century porcelain -
this catalogue from a 2008 exhibition at the Lacquer Museum in Muenster.