Agnezia himeboja (Oka, 1915) (basis of record)
Ascidia ahodori Oka, 1927 (additional source)
Ascidia armata Hartmeyer, 1906 (additional source)
Ascidia longistriata Hartmeyer, 1906 (additional source)
Ascidia matoya Tokioka, 1949 (additional source)
Ascidia zara Oka, 1935 (additional source)
Boltenia echinata iburi (basis of record)
Boltenia iburi (Oka, 1934) accepted as Boltenia echinata (Linnaeus, 1767) (basis of record)
Boltenia transversaria (Sluiter, 1904) (basis of record)
Chelyosoma dofleini Hartmeyer, 1906 (additional source)
Chelyosoma yezoense Oka, 1928 (additional source)
Cnemidocarpa clara (Hartmeyer, 1906) (basis of record)
Cnemidocarpa fertilis (Hartmeyer, 1906) (basis of record)
Cnemidocarpa fertilis f. minor Tokioka, 1954 accepted as Cnemidocarpa fertilis minor Tokioka, 1954 (additional source)
Cnemidocarpa fertilis minor Tokioka, 1954 (additional source)
Cnemidocarpa irene (Hartmeyer, 1906) (basis of record)
Cnemidocarpa miyadii Tokioka, 1949 (additional source)
Cnemidocarpa ramosa Nishikawa, 1991 (original description)
Corella japonica Herdman, 1880 (additional source)
Halocynthia aurantium pyriformis Kott, 1968 (additional source)
Halocynthia aurantium typica Kott, 1968 accepted as Halocynthia aurantium aurantium (Pallas, 1787) (additional source)
Halocynthia turboga (Oka, 1929) (basis of record)
Herdmania mirabilis (Drasche, 1884) (basis of record)
Microcosmus multitentaculatus Tokioka, 1953 accepted as Microcosmus anchylodeirus Traustedt, 1883 (additional source)
Molgula eobia Redikorzev, 1941 (additional source)
Molgula hartmeyeri Oka, 1914 (additional source)
Molgula tectiformis Nishikawa, 1991 (original description)
Perophora annectens Ritter, 1893 (additional source)
Perophora japonica Oka, 1927 (additional source)
Polycarpa cryptocarpa cryptocarpa (Sluiter, 1885) (basis of record)
Polycarpa cryptocarpa kroboja (Oka, 1906) (basis of record)
Polycarpa divisa (Ostroumov & Pavlenko, 1911) (basis of record)
Polyzoa pacifica Tokioka, 1951 (additional source)
Rhizomolgula japonica Oka, 1926 (additional source)
Styela monogamica Oka, 1935 (additional source)
Styela tokiokai Nishikawa, 1991 (original description)

Japan for Molgula manhattensis (De Kay, 1843)  (origin: alien)
Japanese part of the North Pacific Ocean for Ciona intestinalis (Linnaeus, 1767)  (origin: alien)
Japanese part of the Sea of Japan for Styela plicata (Lesueur, 1823)  (origin: alien)