Alvania flava Okutani, 1964 (original description)
Amaea luxus Okutani, 1964 accepted as Periapta polygyrella (P. Fischer, 1897) (original description)
Basilissa soyoae Okutani, 1964 (original description)
Benthomangelia subtrophonoidea Okutani, 1964 accepted as Propebela subtrophonoidea (Okutani, 1964) (original description)
Boreotrophon flos Okutani, 1964 (original description)
Buccinum kashimanum Okutani, 1964 (original description)
Choristes mollis Okutani, 1964 (original description)
Choristes nipponica Okutani, 1964 accepted as Moelleriopsis nipponica (Okutani, 1964) (original description)
Clinopegma hachijoensis Okutani, 1964 accepted as Japelion hachijoensis (Okutani, 1964) (original description)
Funitoma delicata Okutani, 1964 accepted as Curtitoma delicata (Okutani, 1964) (original description)
Haloceras japonica Okutani, 1964 accepted as Haloceras japonicum Okutani, 1964 (original description)
Haloceras millestriata (Okutani, 1964) accepted as Haloceras millestriatum (Okutani, 1964) (original description)
Imaclava hosoi Okutani, 1964 accepted as Crassispira hosoi (Okutani, 1964) (original description)
Latisipho felis Okutani, 1964 accepted as Buccinum felis (Okutani, 1964) (original description)
Liotia vitreospina Okutani, 1964 (original description)
Lunatia nux Okutani, 1964 accepted as Euspira nux (Okutani, 1964) (original description)
Microstelma flava Okutani, 1964 accepted as Punctulum flavum (Okutani, 1964) (original description)
Mohnia daphnelloides Okutani, 1964 accepted as Retifusus daphnelloides (Okutani, 1964) (original description)
Neadmete profundicola Okutani, 1964 (original description)
Nematoma microvoluta Okutani, 1964 accepted as Oenopota candida (Yokoyama, 1926) (original description)
Neptunea insularis robusta Okutani, 1964 accepted as Neptunea robusta Okutani, 1964 (original description)
Nodiscala japonica Okutani, 1964 accepted as Papuliscala japonica (Okutani, 1964) (original description)
Palaeadmete bathyalis Okutani, 1964 accepted as Iphinopsis bathyalis (Okutani, 1964) (original description)
Paradrillia sagamiana Okutani, 1964 (original description)
Pleurotomella granuliapicata Okutani, 1964 (original description)
Profundiconus soyomaruae Okutani, 1964 accepted as Profundiconus profundorum (Kuroda, 1956) (original description)
Propebela (Turritoma) venusta Okutani, 1964 accepted as Propebela exquisita Bartsch, 1941 (original description)
Propebela bigranulosa Okutani, 1964 accepted as Mioawateria bigranulosa (Okutani, 1964) (original description)
Propebela plicata Okutani, 1964 accepted as Plicisyrinx plicata (Okutani, 1964) (original description)
Ptychosyrinx bisinuata japonica Okutani, 1964 accepted as Cryptogemma praesignis (E. A. Smith, 1895) (original description)
Puncturella (Fissurisepta) undulata Okutani, 1964 accepted as Clathrosepta undulata (Okutani, 1964) (original description)
Scissurella sagamiana Okutani, 1964 accepted as Anatoma sagamiana (Okutani, 1964) (original description)
Seguenzia mirabilis Okutani, 1964 (original description)
Seguenzia nipponica Okutani, 1964 (original description)
Soyonassa Okutani, 1964 (original description)
Soyonassa porifericola Okutani, 1964 (original description)
Tachyrhynchus subvenustellus Okutani, 1964 accepted as Turritellopsis subvenustella (Okutani, 1964) (original description)
Taranis (Nepotilla) nezi Okutani, 1964 accepted as Nepotilla nezi (Okutani, 1964) (original description)
Taranis japonicus Okutani, 1964 accepted as Cryptogemma japonica (Okutani, 1964) (original description)
Torellia millestriata Okutani, 1964 accepted as Haloceras millestriatum (Okutani, 1964) (original description)
Trophonopsis soyoae minimus Okutani, 1964 accepted as Abyssotrophon minimus (Okutani, 1964) (original description)
Turbonilla punicea Okutani, 1964 accepted as Turbonilla corgani Okutani, 1968 (original description)
Velutina abyssicola Okutani, 1964 (original description)
Zemitrella cera Okutani, 1964 (original description)
Zemitrella siligo Okutani, 1964 (original description)

Japanese Exclusive Economic Zone for Choristes mollis Okutani, 1964 
Japanese Exclusive Economic Zone for Latisipho felis Okutani, 1964 
Japanese Exclusive Economic Zone for Ptychosyrinx bisinuata japonica Okutani, 1964 
Japanese Exclusive Economic Zone for Soyonassa porifericola Okutani, 1964 
Sea of Japan for Punctulum flavum (Okutani, 1964)