kotsu-kotsu
A light, rhythmic tapping sound — shoes on hard floor, a woodpecker pecking, or knocking on wood. Also describes steady, patient effort (working kotsu-kotsu).
💡High heels on a hallway — 'Her shoes went kotsu-kotsu down the corridor.'
廊下をこつこつと靴の音が響いた。
Shoes echoed kotsu-kotsu down the hallway.
I could hear footsteps ___ echoing in the empty building.
空っぽのビルで足音が○○と響いていた。