Anthracosia jidoensis (Kobayashi, 1933) † (basis of record)
Brotiopsis wakinoensis ryohoriensis K. Suzuki, 1943 † accepted as Brotiopsis wakinoensis (T. Kobayashi & K. Suzuki, 1936) † (source of synonymy)
Bulimus rakutoensis K. Suzuki, 1943 † accepted as Bithynia rakutoensis (K. Suzuki, 1943) † (basis of record)
Hydrobia (Pachydrobia) gyokusoensis K. Suzuki, 1943 † accepted as Pachydrobia gyokusoensis (K. Suzuki, 1943) † (basis of record)
Itomelania K. Suzuki, 1943 † (basis of record)
Itomelania basicordata H. Suzuki, 1943 † (basis of record)
Kumania kawaguchiensis Ota, 1960 † (additional source)
Melanoides (Yoshimonia) katsukiensis Ota, 1960 † accepted as Yoshimonia katsukiensis (Ota, 1960) † (additional source)
Melanoides (Yoshimonia) kokurensis Hase, 1960 † accepted as Yoshimonia kokurensis (Hase, 1960) † (basis of record)
Melanoides minima T. Kobayashi & K. Suzuki, 1937 † (basis of record)
Melanoides vulgaris T. Kobayashi & K. Suzuki, 1937 † (basis of record)
Micromelania katoensis K. Suzuki, 1943 † accepted as Probaicalia katoensis (K. Suzuki, 1943) † (basis of record)
Siragimelania K. Suzuki, 1940 † (basis of record)
Siragimelania japonica (Matsumoto, 1938) † (basis of record)
Siragimelania tateiwai (K. Suzuki, 1940) † (basis of record)
Siragimelania tateiwai acuticostata (K. Suzuki, 1940) † (basis of record)
Siragimelania tateiwai tateiwai (K. Suzuki, 1940) † (basis of record)