Rod Japigny
- Japigny kirschbaum Meunier, Jégu & Keith, 2011
Rod Japonoconger
- Japonoconger africanus (Poll, 1953)
- Japonoconger caribbeus Smith & Kanazawa, 1977
- Japonoconger sivicolus (Matsubara & Ochiai, 1951)
Actinopterygii > Anguilliformes > Congridae
Rod Japonolaeops
- Japonolaeops dentatus Amaoka, 1969
Actinopterygii > Pleuronectiformes > Bothidae
Rod Japonolycodes
- Japonolycodes abei (Matsubara, 1936)
Actinopterygii > Perciformes > Zoarcidae
Rod Javichthys
- Javichthys kailolae Hardy, 1985
Actinopterygii → Tetraodontiformes → Tetraodontidae
Rod Jaydia J. L. B. Smith, 1961
- Jaydia argyrogaster (Weber, 1909)
- Jaydia melanopus (Weber, 1911)
- Jaydia photogaster (Gon & Allen, 1998)
Pisces → Actinopterygii → Perciformes → Apogonidae