Ancilla okawai Yokoyama, 1923 † accepted as Ancilla albocallosa (Lischke, 1873) accepted as Amalda albocallosa (Lischke, 1873) (original description)
Arca castellata Yokoyama, 1923 † accepted as Anadara satowi castellata (Yokoyama, 1923) † (original description)
Clementia speciosa Yokoyama, 1923 accepted as Clementia papyracea (Gmelin, 1791) (original description)
Drillia dainichiensis Yokoyama, 1923 † accepted as Paradrillia dainichiensis (Yokoyama, 1923) † (original description)
Drillia sobrina Yokoyama, 1923 † accepted as Comitas sobrina (Yokoyama, 1923) † (original description)
Eburna elata Yokoyama, 1923 † accepted as Babylonia elata (Yokoyama, 1923) † (original description)
Galeodea (Sconsia) J. E. Gray, 1847 accepted as Sconsia J. E. Gray, 1847 (basis of record)
Galeodea (Sconsia) japonica Yokoyama, 1923 † accepted as Phalium yokoyamai Nomura & Hatei, 1933 † (additional source)
Mitra pristina Yokoyama, 1923 † accepted as Cancellaria pristina (Yokoyama, 1923) † (original description)
Nassa (Hima) demissa Yokoyama, 1923 † accepted as Nassarius demissus (Yokoyama, 1923) † (original description)
Turritella perterebra Yokoyama, 1923 † (original description)
Umbonium mysticum Yokoyama, 1923 † (original description)
Umbonium suchiense Yokoyama, 1923 † (original description)