cross-cut sawtooth oak charcoal; chrysanthemum charcoal
A type of charcoal made from sawtooth oak, cut to reveal a cross-section resembling a chrysanthemum flower. Primarily used in tea ceremonies.
In tea ceremony, chrysanthemum charcoal is often used.
This chrysanthemum charcoal burns for a long time.
Compound of 菊 (kiku, 'chrysanthemum') and 炭 (sumi, 'charcoal'), referring to the flower-like cross-section pattern of the charcoal.