研究論文（2021～）

Nagatomo Y, Horii S,Hirai J, Hashihama F, Sado T, Fukuchi T, Miya M, Takahashi K. (2023) Geographic distribution of micronektonic fish communities in the subtropical North Pacific: the effect of primary productivity and nitrogen fixation. Progress in Oceanography, 217: 103086.

Sildever S, Nishi N, Tazawa S, Kasai H,Hirai J, Shiomoto H, Kikuchi T, Katakura S, Nagai S (2023) Eight years of weekly eDNA monitoring in the north-western Pacific. Environmental DNA.

Chang T, Hunt BPV,Hirai J, Suttle CA (2023) Divergent RNA viruses infecting sea lice, major ectoparasites of fish. PLOS Pathogens. 19: e1011386.

Watanabe T,Hirai J, Sildever S, Tadokoro K, Hidaka K, Tanita I, Nishiuchi K, Iguchi N, Kasai H, Nishi N, Katakura S, Taniuchi Y, Kodama T, Tashiro S, Nakae M, Okazaki Y, Kitajima S, Sogawa S, Hasegawa T, Azumaya T, Hiroe Y, Ambe D, Setou T, Ito D, Kusaka A, Okunishi T, Tanaka T, Kuwata A, Hasegawa D, Kakehi S, Shimizu Y, Nagai S (2023) Improving taxonomic classification of marine zooplankton by molecular approach: registration of taxonomically verified 18S and 28S rRNA gene sequences. PeerJ, 11: e15427.

Hirai J, Katakura S, Nagai S (2023) Comparisons of genetic population structures of copepodsPseudocalanusspp. in Okhotsk Sea: first record of P. acuspesin coastal waters off Japan. Marine Biodiversity, 53: 12.

Takahashi K, Itoh H,Hirai J, Tadokoro K, Nishiuchi K (2022) A new species of genusSapphirina(Copepoda, Cyclopoida) from the Kuroshio Extension region in the western North Pacific Ocean. Plankton and Benthos Research, 17: 358-368.

Ueda H, Itoh H,Hirai J, Hidaka K (2022)Paracalanus orientalisn. sp. (Copepoda, Calanoida), formerly referred toP. parvusin Japanese coastal waters. Plankton and Benthos Research, 17: 221-230.

Hirai J,Chen F, Itoh H, Tadokoro K, Lemay MA, Hunt BPV,Tsuda A(2022) Molecular and morphological analyses to improve taxonomic classification of Metridia lucens/pacifica in the North Pacific. Journal of Plankton Research, 44: 454–463.

Hirai J, Urayama S, Takaki Y, Hirai M, Nagasaki K, Nunoura T (2022) RNA virosphere in a marine zooplankton community in the subtropical western North Pacific. Microbes and Environments, 37: ME21066.

Miyazono, K.,Yamashita, R., Miyamoto, H., Ishak, N. H. A., Tadokoro, K., Shimizu, Y., & Takahashi, K. (2021). Large-scale distribution and composition of floating plastic debris in the transition region of the North Pacific. Marine Pollution Bulletin, 170, 112631.
【プレスリリース】北太平洋外洋移行域表層のマイクロプラスチック分布実態を解明

Tae OHGAKI, Hideshige TAKADA, Ryu YOSHIDA, Kaoruko MIZUKAWA, Bee Geok YEO, Mona ALIDOUST, Natsuki HIRAI,Rei YAMASHITA, Takashi TOKUMARU, Izumi WATANABE, Siaw ONWONA-AGYEMAN, Patricia GARDINER, Marcus ERIKSEN, Jay F. KELLY, Carlos J. RODRÍGUEZ-SIERRA, Laurent COLASSE, Juan BAZTAN, Fabiano Prado BARRETTO, Gabriel Mendes IZAR, Denis ABESSA, Mohamad Pauzi ZAKARIA, Charita S. KWAN, Mahua SAHA, Peter G. RYAN, Steven WEERTS, John OFOSU-ANIM, Edward Benjamin SABI, Lailah Gifty AKITA, Heidi TAIT, Cecilia ERIKSSON, Harry BURTON (2021). International pellet watch: Global monitoring of polybrominated diphenyl ethers (PBDEs) in plastic resin pellets. Environmental Monitoring and Contaminants Research, 1, 75-90.

Rei YAMASHITA, Nagako HIKI, Fumika KASHIWADA, Hideshige TAKADA, Kaoruko MIZUKAWA, Britta Denise HARDESTY, Lauren ROMAN, David HYRENBACH, Peter G. RYAN, Ben J. DILLEY, Juan Pablo MUÑOZ-PÉREZ, Carlos A. VALLE, Christopher K. PHAM, João FRIAS, Bungo NISHIZAWA, Akinori TAKAHASHI, Jean-Baptiste THIEBOT, Alexis WILL, Nobuo KOKUBUN, Yuuki Y. WATANABE, Takashi YAMAMOTO, Kozue SHIOMI, Ui SHIMABUKURO, Yutaka WATANUKI (2021). Plastic additives and legacy persistent organic pollutants in the preen gland oil of seabirds sampled across the globe. Environmental Monitoring and Contaminants Research, 1, 97-112.

Kobari T, Tokumo Y, Sato I, Kume G,Hirai J (2021)Metabarcoding analysis of trophic sources and linkages in the plankton community of the Kuroshio and neighboring waters. Scientific Reports, 11: 23265.
【プレスリリース】黒潮生態系を支える複雑な食物網の仕組みを解明

Zhou F,Hirai J, Hamasaki K, Horii S,Tsuda A(2021) Feeding ecology of three euphausiid species in the North Pacific Ocean inferred from 18S V9 metabarcoding and stable isotope analysis. Frontiers in Marine Science, 8:756067.

Kume G, Shigemura T, Okanishi M,Hirai J, Shiozaki K, Ichinomiya M, Komorita T, Habano A, Makino F, Kobari T (2021) Distribution, feeding habits, and growth of chub mackerel, Scomber japonicus, larvae during a high-stock period in the northern Satsunan area, southern Japan. Frontiers in Marine Science, 8:725227.
【プレスリリース】小型浮魚類の産卵及び成育場としての北部薩南海域の重要性を明らかに

Hirai J, Hidaka K, Nagai S, Shimizu Y (2021) DNA /RNA metabarcoding and morphological analysis of epipelagic 　copepod communities in the Izu Ridge off the southern coast of Japan. ICES Journal of Marine Science.

Hirai J, Yamazaki K, Hidaka K, Nagai S, Shimizu Y, Ichikawa T (2021) Characterization of diversity and community 　structure of small planktonic copepods in the Kuroshio region off Japan using a metabarcoding approach. Marine 　　Ecology Progress Series, 657, 25–41.

Kume G, Kobari T,Hirai J, Kuroda H, Takeda T, Ichinomiya M, Komorita T, Aita-Noguchi M, Hyodo F (2021) Diet niche segregation of co-occurring larval stages of mesopelagic and commercially important fishes in the Osumi Strait assessed through morphological, DNA metabarcoding, and stable isotope analyses. Marine Biology, 168, 6.