Bela kagana Yokoyama, 1927 † accepted as Oenopota kagana (Yokoyama, 1927) † (original description)
Bittium tuberculosum Yokoyama, 1927 † accepted as Tachyrhynchus tuberculosus (Yokoyama, 1927) † (original description)
Bittium venustellum Yokoyama, 1927 † accepted as Tachyrhynchus venustellus (Yokoyama, 1927) † (original description)
Cardium civicum Yokoyama, 1927 † accepted as Cardiolucina civica (Yokoyama, 1927) (original description)
Cardium fastosum Yokoyama, 1927 † accepted as Keenocardium fastosum (Yokoyama, 1927) † (original description)
Littorina incisa Yokoyama, 1927 † (original description)
Meretrix tauyensis Yokoyama, 1927 † accepted as Pseudamiantis tauyensis (Yokoyama, 1927) † (original description)
Mitra kobayashii Yokoyama, 1927 † accepted as Merica kobayashii (Yokoyama, 1927) † (original description)
Ocinebra falcata (G. B. Sowerby II, 1834) accepted as Ocinebrellus falcatus (G. B. Sowerby II, 1834) (basis of record)
Raphitoma ozawai Yokoyama, 1927 † (original description)
Solariella pseudobscura Yokoyama, 1927 † accepted as Minolia pseudobscura (Yokoyama, 1927) (original description)
Tellina kakumana Yokoyama, 1927 † accepted as Thracia kakumana (Yokoyama, 1927) (original description)
Thyasira crassiuscula Yokoyama, 1927 † (original description)
Turbonilla (Ptycheulimella) inscitula Yokoyama, 1927 † (original description)

Honshu for Meretrix tauyensis Yokoyama, 1927 † 
Japan for Cardium civicum Yokoyama, 1927 † 

 Type locality

 for Meretrix tauyensis Yokoyama, 1927 †

Kaga, Ishikawa Prefecture, Japan [details]