A tool used to smooth and level ash in a traditional Japanese brazier (火鉢).
火鉢の灰を灰押さえでならす。
I level the ash in the brazier with an ash leveler.
Compound of 灰 (hai, 'ash') and 押さえ (osae, 'presser' or 'holder'), from the verb 押さえる (osaeru, 'to press down').