There are 61 endemic species in Japan Sea, Japan (zone 22)
Aetideopsis cristata Tanaka, 1957 (F,M)(presence in 1 zones) Candacia grandis Tanaka, 1964 (F,M)(presence in 1 zones) Caromiobenella hamatapex (Grygier & Ohtsuka, 1995) (F)(presence in 1 zones) Centropages maigo Ohtsuka, Itoh & Mizushima, 2005 (F,M)(presence in 1 zones) Chiridius longispinus Tanaka, 1957 (M)(presence in 1 zones) Cymbasoma bullatum (A. Scott, 1909) (M)(presence in 1 zones) Elenacalanus tageae Bradford-Grieve, Blanco-Bercial & Boxshall, 2017 (F,M)(presence in 1 zones) Euaugaptilus luxus Tanaka & Omori, 1974 (F)(presence in 1 zones) Euaugaptilus nudus Tanaka, 1964 (F)(presence in 1 zones) Gaetanus rubellus Markhaseva, 1996 (F)(presence in 1 zones) Gaetanus sp. Tanaka & Omori, 1970 (M)(presence in 1 zones) Goniopsyllus dokdoensis Cho, Kim & Lee, 2010 (F,M)(presence in 1 zones) Metacalanus curvirostris Ohtsuka, 1985 (F,M)(presence in 1 zones) Metridia sp. Chihara & Murano, 1997 (F)(presence in 1 zones) Misophriopsis okinawensis Ohtsuka, Huys, Boxshall & Itô, 1992 (F,M)(presence in 1 zones) Nudivorax todai Lee & Huys, 2000 (F,M)(presence in 1 zones) Nullosetigera auctiseta Soh, Ohtsuka, Imabayashi & Suh, 1999 (F,M)(presence in 1 zones) Oithona cruralis Tanaka, 1977 (F)(presence in 1 zones) Oithona rostralis Nishida, Tanaka & Omori, 1977 (F)(presence in 1 zones) Paracalanus orientalis Itoh & Ueda, 2022 (F,M)(presence in 1 zones) Paracalanus sp. Liang & Uye, 1996 (F,M, juv.)(presence in 1 zones) Paramisophria itoi Ohtsuka, 1985 (F,M)(presence in 1 zones) Paramisophria sp.2 Tanaka, 1966 (F)(presence in 1 zones) Pontella rostraticauda Ohtsuka, Fleminger & Onbé, 1987 (F,M)(presence in 1 zones) Pontellopsis pacifica Chiba, 1953 (F,M)(presence in 1 zones) Pseudocyclops lepidotus Barr & Ohtsuka, 1989 (F,M)(presence in 1 zones) Pseudocyclops schminkei Chullasorn, Ferrari & Dahms, 2010 (F,M)(presence in 1 zones) Pseudodiaptomus ishigakiensis Nishida, 1985 (F,M)(presence in 1 zones) Pseudodiaptomus koreanus Soh, Kwon, Lee & Yoon, 2012 (F,M)(presence in 1 zones) Pseudodiaptomus nihonkaiensis Hirakawa, 1983 (F,M)(presence in 1 zones) Pseudodiaptomus yamato Ueda & Sakachi, 2019 (F,M)(presence in 1 zones) Ryocalanus spinifrons Shimode, Toda & Kikuchi, 2000 (F)(presence in 1 zones) Saphirella japonica Itoh & Nishida, 1995 (presence in 1 zones) Saphirella sp. Brodsky, 1948 (presence in 1 zones) Scaphocalanus sp. Tanaka, 1961 (presence in 1 zones) Scolecithricella avia Tanaka, 1962 (M)(presence in 1 zones) Scolecithricella denticulata Tanaka, 1962 (M)(presence in 1 zones) Scolecithricella lanceolata Tanaka, 1962 (M)(presence in 1 zones) Scolecithricella modica Tanaka, 1962 (F)(presence in 1 zones) Scolecithricella sp. Tanaka, 1962 (M)(presence in 1 zones) Scolecithricella vespertina Tanaka, 1955 (F)(presence in 1 zones) Stephos pacificus Ohtsuka & Hiromi, 1987 (F,M)(presence in 1 zones) Stephos robustus Ohtsuka & Hiromi, 1987 (F,M)(presence in 1 zones) Stephos tsuyazakiensis Tanaka, 1966 (F,M)(presence in 1 zones) Tharybis sagamiensis Tanaka, 1960 (F)(presence in 1 zones) Thompsonopia muranoi (Ohtsuka, 1992) (F,M)(presence in 1 zones) Tortanus (Atortus) rubidus Tanaka, 1965 (F,M)(presence in 1 zones) Tortanus (Eutortanus) komachi Itoh, Ohtsuka & Sato, 2001 (F,M)(presence in 1 zones) Tortanus (Eutortanus) terminalis Ohtsuka & Reid, 1998 (F,M)(presence in 1 zones) Triconia hirsuta Wi, Böttger-Schnack & Soh, 2010 (F)(presence in 1 zones) Undeuchaeta japonica Chiba, 1956 (F)(presence in 1 zones) Undinothrix spinosa Tanaka, 1961 (F)(presence in 1 zones) Xanthocalanus amabilis Tanaka, 1960 (F)(presence in 1 zones) Xanthocalanus cornifer (Tanaka, 1960) (M)(presence in 1 zones) Xanthocalanus crassirostris (Tanaka, 1960) (M)(presence in 1 zones) Xanthocalanus irritans (Tanaka, 1960) (M)(presence in 1 zones) Xanthocalanus legatus Tanaka, 1960 (F)(presence in 1 zones) Xanthocalanus oculatus (Tanaka, 1960) (M)(presence in 1 zones) Xanthocalanus pectinatus Tanaka, 1960 (M)(presence in 1 zones) Xanthocalanus penicillatus Tanaka, 1960 (F)(presence in 1 zones) Xanthocalanus serratus (Tanaka, 1960) (M)(presence in 1 zones)
