Rakuyaki (楽焼) or Raku (樂) is a form of
Japanese pottery characterized by low firing
temperatures (resulting in a fairly porous body), lead
glazes, and the removal of pieces from the
kiln while still glowing hot. In the traditional
Japanese firing process, the pot is removed from the hot
kiln and put directly into water or allowed to cool in the
open air. Raku is considered the traditional method
for creating bowls for the
Japanese tea ceremony. Raku tea bowls are hand-made from
earthenware, each with a unique shape and style. Raku
techniques have been adopted and modified by contemporary
potters worldwide.