2014

• Kajihara, H. & Shimada, D., 2014: Two new species of free-living marine nematodes of Adoncholaimus Filipjev, 1918 (Oncholaimida: Oncholaimidae: Adoncholaiminae) from Hokkaido, northern Japan, with a key to species and discussion of the genus. Nematology, 16 (4): 437–451. Abstract: .

2015

• Nishi, E., Matsuo, K., Capa, M., Tomioka, S., Kajihara, H., Kupriyanova, E.K. & Polgar, G. 2015. Sabellaria jeramae, a new species (Annelida: Polychaeta: Sabellariidae) from the shallow waters of Malaysia, with a note on the ecological traits of reefs. Zootaxa 4052(5): 555–568. DOI: 10.11646/zootaxa.4052.5.3 . Preview (PDF) Reference page. 

• Woo, S.P., Yasin, Z., Tan, S.H., Kajihara, H. & Fujita, T. 2015. Sea cucumbers of the genus Stichopus Brandt, 1835 (Holothuroidea, Stichopodidae) in Straits of Malacca with description of a new species. ZooKeys 545: 1-26. DOI: 10.3897/zookeys.545.6415 Full article Reference page. 

2017

• Jimi, N., Fujiwara, Y. & Kajihara, H. 2017. Remarkable biodiversity of flabelligerids in Japan: seven new species of Diplocirrus (Annelida: Flabelligeridae) from Japanese waters. Zootaxa 4337(3): 344–360. DOI: 10.11646/zootaxa.4337.3.2 . Reference page. 

• Jimi, N., Salazar-Vallejo, S.I. & Kajihara, H. 2017. Designation of a neotype and redescription of Hesione reticulata von Marenzeller, 1879 from Japan (Annelida, Hesionidae). ZooKeys 657: 29—41. DOI: 10.3897/zookeys.657.11064 . Reference page. 

• Jimi, N., Tsujimoto, M., Watanabe, K., Kakui, K. & Kajihara, H. 2017. A new species and the shallowest record of Flabegraviera Salazar-Vallejo, 2012 (Annelida: Flabelligeridae) from Antarctica. Zootaxa 4221(4): 477–485. DOI: 10.11646/zootaxa.4221.4.4 . Reference page. 

• Oya, Y. & Kajihara, H. 2017. Description of a new Notocomplana species (Platyhelminthes: Acotylea), new combination and new records of Polycladida from the northeastern Sea of Japan, with a comparison of two different barcoding markers. Zootaxa 4282(3): 526–542. DOI: 10.11646/zootaxa.4282.3.6 . Reference page. 

• Woo, S.P., Ogawa, A., Tan, S.H., Yasin, Z., Kajihara, H. & Fujita, T. 2017. A taxonomic revision of the genus Apostichopus (Holothuroidea: Stichopodidae) from Japan. Zootaxa 4350(1): 121–135. DOI: 10.11646/zootaxa.4350.1.7 . Reference page. 

2018

• Jimi, N., Kimura, T., Ogawa, A. & Kajihara, H. 2018. A new species of the rare, deep-sea polychaete genus Benthoscolex from the Sea of Kumano, Japan (Annelida, Amphinomidae). ZooKeys 738: 81–88. DOI: 10.3897/zookeys.738.22927 Reference page. 

• Takeda, N. & Kajihara, H. 2018. A New Genus and Five New Species of Kalyptorhynchia (Platyhelminthes: Rhabdocoela) Discovered in Northern Japan. Species Diversity 23: 1–11. full article (PDF). Reference page. 

2019

• Hasegawa, N. & Kajihara, H. 2019. A redescription of Syncarpa composita (Ascidiacea, Stolidobranchia) with an inference of its phylogenetic position within Styelidae. Zookeys, 857: 1–15. DOI: 10.3897/zookeys.857.32654 Reference page. 

• Oya, Y., Kimura, T. & Kajihara, H. 2019. Description of a new species of Paraplehnia (Polycladida, Stylochoidea) from Japan, with inference on the phylogenetic position of Plehniidae. Zookeys, 864: 1–13. DOI: 10.3897/zookeys.864.33955 Reference page. 

• Park, T., Lee, S-H., Sun, S-C. & Kajihara, H. 2019. Morphological and molecular study on Yininemertes pratensis (Nemertea, Pilidiophora, Heteronemertea) from the Han River Estuary, South Korea, and its phylogenetic position within the family Lineidae. Zookeys, 852: 31–51. DOI: 10.3897/zookeys.852.32602 Reference page. 

• Tsuyuki, A., Oya, Y. & Kajihara, H. 2019. A New Species of Prosthiostomum (Platyhelminthes: Polycladida) from Shirahama, Japan. Species Diversity 24(1): 137-143. full article (PDF). Reference page.