Ascidia sagamiana Tokioka, 1953 (original description)
Ascidia sydneiensis var. divisa (Sluiter, 1898) (basis of record)
Ascidia sydneiensis var. samea (Oka, 1935) (basis of record)
Chelyosoma sibogae Sluiter, 1904 (additional source)
Didemnum apersum Tokioka, 1953 (original description)
Didemnum flagellatum Tokioka, 1953 (original description)
Didemnum japonicum (Herdman, 1886) (basis of record)
Didemnum pacificum Tokioka, 1953 (original description)
Didemnum partitum Tokioka, 1953 (original description)
Didemnum translucidum Tokioka, 1953 (original description)
Distaplia dubia (Oka, 1927) (basis of record)
Eudistoma sagamiana Tokioka, 1953 (original description)
Halocynthia cactus (Oka, 1932) (basis of record)
Halocynthia roretzi (Drasche, 1884) (basis of record)
Leptoclinides madara Tokioka, 1953 (original description)
Leptoclinides ocellatus (Sluiter, 1909) (basis of record)
Microcosmus hartmeyeri Oka, 1906 (additional source)
Molgula aidae Oka, 1914 (additional source)
Perophora sagamiensis Tokioka, 1953 (original description)
Polycarpa granosa Tokioka, 1953 (original description)
Polycarpa maculata Hartmeyer, 1906 (additional source)
Polycarpa psammotesta Tokioka, 1953 (original description)
Polysyncraton sagamiana (Tokioka, 1953) (basis of record)
Pyura trigamica Tokioka, 1953 (original description)
Rhopalaea macrothorax Tokioka, 1953 (original description)
Sidneioides snamoti (Oka, 1927) (basis of record)
Styela izuana (Oka, 1934) (basis of record)
Styela longipedata Tokioka, 1953 (original description)
Sycozoa kanzasi (Oka, 1930) (basis of record)