Basilissa laeviuscula Yokoyama, 1922 † accepted as Heterogen japonica (E. von Martens, 1861) (original description)
Bela recticostulata Yokoyama, 1922 † (original description)
Cardium tokunagai Yokoyama, 1922 † (original description)
Cerithiopsis (Seila) trisulcata Yokoyama, 1922 † accepted as Cerithiella trisulcata (Yokoyama, 1922) (original description)
Cerithiopsis nodosocostatus Yokoyama, 1922 † (original description)
Conotalopia sematensis (Oyama, 1943) (additional source)
Corbicula kobelti Yokoyama, 1922 † accepted as Corbicula (Corbicula) japonica Prime, 1864 represented as Corbicula japonica Prime, 1864 (original description)
Corbicula sandaiformis Yokoyama, 1922 † accepted as Corbicula (Corbicula) japonica Prime, 1864 represented as Corbicula japonica Prime, 1864 (original description)
Cryptomya busoensis Yokoyama, 1922 (original description)
Cyclostrema stillicidiatum Yokoyama, 1922 † accepted as Microthyca crenellifera (A. Adams, 1862) (original description)
Lima vulgatula Yokoyama, 1922 † (original description)
Limopsis nipponica Yokoyama, 1922 accepted as Nipponolimopsis nipponica (Yokoyama, 1922) (original description)
Minolia subangulata Kuroda & T. Habe, 1952 accepted as Minolia punctata A. Adams, 1860 (additional source)
Odostomia shimosensis Yokoyama, 1922 (original description)
Olivella spretoides Yokoyama, 1922 (original description)
Parviterebra raritans Yokoyama, 1922 † (original description)
Philine pygmaea Yokoyama, 1922 † (original description)
Philine takatensis Yokoyama, 1922 † (original description)
Poromya flexuosa Yokoyama, 1922 (original description)
Skenea planorboides Yokoyama, 1922 † (original description)
Terebra suavidica Yokoyama, 1922 (original description)
Turbonilla planicostata Yokoyama, 1922 (original description)
Yoldia notabilis Yokoyama, 1922 (original description)