| Habitats of special importance to resident killer whales (Orcinus orca) off the West Coast of Canada JKB Ford, JF Pilkington, A Reira, M Otsuki, B Gisborne, RM Abernethy, ... Fisheries and Oceans Canada, Ecosystems and Oceans Science, 2017 | 34 | 2017 |
| The migration of fin whales into the southern Chukchi Sea as monitored with passive acoustics K Tsujii, M Otsuki, T Akamatsu, I Matsuo, K Amakasu, M Kitamura, ... ICES Journal of Marine Science 73 (8), 2085-2092, 2016 | 32 | 2016 |
| Sightings of the western stock of North Pacific right whales (Eubalaena japonica) in the far southeast of the Kamchatka Peninsula. K Sekiguchi, H Onishi, H Sasaki, S Haba, Y Iwahara, D Mizuguchi, ... Marine Mammal Science 30 (3), 2014 | 14 | 2014 |
| Habitats of special importance to resident killer whales (Orcinus orca) off the west coast of Canada. Fisheries and Oceans Canada JK Ford, JF Pilkington, M Otsuki, B Gisborne, RM Abernethy, ... Ecosystems and Oceans Science, 2017 | 9 | 2017 |
| Annual variation of oceanographic conditions changed migration timing of bowhead whales Balaena mysticetus in the southern Chukchi Sea K Tsujii, M Otsuki, T Akamatsu, K Amakasu, M Kitamura, T Kikuchi, ... Polar Biology 44, 2289-2298, 2021 | 8 | 2021 |
| Diel changes in ribbon seal Histriophoca fasciata vocalizations during sea ice presence in the Nemuro Strait, Sea of Okhotsk M Otsuki, T Akamatsu, T Nobetsu, D Mizuguchi, Y Mitani Polar Biology 41, 451-456, 2018 | 5 | 2018 |
| Migration monitoring of fin whales in the southern Chukchi Sea with acoustic methods during 2012–2015 K Tsujii, M Otsuki, T Akamatsu, I Matsuo, M Kitamura, T Kikuchi, ... 2016 Techno-Ocean (Techno-Ocean), 49-53, 2016 | 4 | 2016 |
| Testosterone levels in hair of free-ranging male northern fur seals (Callorhinus ursinus) in relation to sampling month, age class and spermatogenesis M Otsuki, T Horimoto, M Kobayashi, Y Morita, S Ijiri, Y Mitani Conservation Physiology 9 (1), coab031, 2021 | 3 | 2021 |
| Non-invasive monitoring of faecal testosterone metabolite concentrations in a northern fur seal (Callorhinus ursinus) M Otsuki, K Kohyama, W Goshima, M Kobayashi, Y Hasegawa, ... Japanese Journal of Zoo and Wildlife Medicine 25 (1), 29-34, 2020 | 3 | 2020 |
| Seasonal and diel changes in cetacean vocalizations monitored by passive acoustic methods in Nemuro Strait adjacent to the Shiretoko World Natural Heritage Site M Otsuki, T Akamatsu, T Nobetsu, Y Mitani Marine Mammal Science 37 (4), 1330-1340, 2021 | 2 | 2021 |
| Brood patch size as a field indicator for feather mercury concentration, but not plastic ingestion, in a harvested seabird of the high Arctic: The little auk Alle alle M Otsuki, M Ogawa, Y Watanuki, Y Mitani, M Ishizuka, Y Ikenaka, ... Polar Science, 101053, 2024 | 1 | 2024 |
| Foraging ecology of mature male Antarctic minke whales (Balaenoptera bonaerensis) revealed by stable isotope analysis of baleen plates H Ishikawa, M Otsuki, T Tamura, K Konishi, T Bando, M Ishizuka, ... Polar Science 31, 100785, 2022 | 1 | 2022 |
| Effect of diet on faecal testosterone metabolite levels in a northern fur seal (Callorhinus ursinus) expressed as ash-free dry weight M Otsuki, K Kohyama, W Goshima, M Kobayashi, Y Hasegawa, Y Morita, ... Coastal marine science 44 (1), 1-6, 2021 | 1 | 2021 |
| Marine debris observed in the North Pacific during Oshoro-maru cruise in 2012 Y Mitani, Y Iwahara, M Otsuki, B Nishizawa, D Mizuguchi, S Haba, ... 北海道大学水産科学研究彙報 64 (1), 25-29, 2014 | 1 | 2014 |
| Multi-component approach to marine food webs in Inglefield Bredning coastal ecosystems, northwestern Greenland JB Thiebot, M Otsuki, A Yushima, M Ogawa, Y Sakuragi, H Tajima, ... | | 2023 |
| Diversity of marine mammal vocalizations off Rausu, Shiretoko, northern Japan M Otsuki, T Akamatsu, T Nobetsu, Y Mitani 2016 Techno-Ocean (Techno-Ocean), 45-48, 2016 | | 2016 |
| Presence of ribbon seal vocalizations are related to sea ice extent in the Nemuro Strait, the Okhotsk Sea M Otsuki, T Akamatsu, T Nobetsu, Y Mitani Journal of the Acoustical Society of America 140 (4_Supplement), 3361-3361, 2016 | | 2016 |
| Seasonal acoustic presence of fin and bowhead whales in relation to prey abundance and oceanographic environments in the southern Chukchi Sea K Tsujii, M Otsuki, T Akamatsu, I Matsuo, K Amakasu, M Kitamura, ... Journal of the Acoustical Society of America 140 (4_Supplement), 3361-3361, 2016 | | 2016 |
| Studies on the nitrogen nutrition of crops. I. Relations between nitrogen dressing and yield of the rice plant. A Fujiwara, K Ohira, M Otsuki | | 1951 |
| The nitrogen nutrition of crops. I. Relation of nitrogen dressing to growth and yield of rice plant. II. Forms and amounts of assimilated nitrogen. A Fujiwara, K Ohira, M Otsuki | | 1951 |
