ash leveler; ash presser
A small tool used to smooth and level ash in a traditional Japanese brazier (火鉢). Often shaped like a small paddle or spatula.
I level the ash in the brazier with an ash leveler.
Compound of 灰 (はい, 'ash') and 押し (おし, 'pressing'), from the verb 押す (おす, 'to press'). The name describes its function of pressing and smoothing ash.