Bahasa Jepangnya “pengukiran cekung”

penggulungan benang dengan tangan; pembuatan lubang sekrup; pengukiran cekung; penggulungan sutra manual

reeling by hand (esp. silk); counter sinking (making conical depression so screw-heads don't protrude above surface); hollowing out (e.g. wooden chair seat, scallop pattern on roof, etc.); hand filature