Director/Senior Research Fellow
Ocean Policy Research Institute of The Sasakawa Peace Foundation
  • Marine Acoustics
  • Ocean Noise

Tomonari Akamatsu is Director at Policy Research Department of OPRI, SPF. He was educated theoretical physics at Tohoku University and received Ph.D. (agriculture) from Nihon University in 1996. His majors are underwater bioacoustics and passive acoustic monitoring of aquatic creatures. He was a senior researcher of National Research Institute of Fisheries Science until 2019 and temporarily studied at National Institute of Polar Research and Thomas Hunt Morgan School of Biological Sciences, University of Kentucky as a visiting scholar. He was an associate editor of Journal of the Marine Acoustic Society of Japan, Bioinspiration & Biomimetics, Journal of Ethology and committee member of marine environmental assessment organized by Ministry of the Environment, NEDO, Ministry of Economy, Trade and Industry. He is a member of cetacean and sirenian specialists groups of IUCN, ISO/TC43/SC3, IEEE/OES Japan chapter. He serves for the Technical committee of Animal Bioacoustics of The Acoustical Society of America, Nominations and Elections Committee of The Society for Marine Mammalogy and various academic services. He was awarded competitive research grants such as CEST, KAKENHI and BRAIN and published over 100 peer reviewed papers.


Underwater bioacoustics, Marine acoustics, Acoustic remote sensing, Noise impact assessment







Otsuki, M., Akamatsu, T., Nobetsu, T., & Mitani, Y. (2021). Seasonal and diel changes in cetacean vocalizations monitored by passive acoustic methods in Nemuro Strait adjacent to the Shiretoko World Natural Heritage Site. Marine Mammal Science.

Lin, T. H., Akamatsu, T., & Tsao, Y. (2021). Sensing ecosystem dynamics via audio source separation: A case study of marine soundscapes off northeastern Taiwan. PLoS computational biology, 17(2), e1008698.

Maeda, S., Sakurai, K., Akamatsu, T., Matsuda, A., Yamamura, O., Kobayashi, M., & Matsuishi, T. F. (2021). Foraging activity of harbour porpoises around a bottom-gillnet in a coastal fishing ground, under the risk of bycatch. PloS one, 16(2), e0246838.

Lin, T. H., Akamatsu, T., Sinniger, F., & Harii, S. (2021). Exploring coral reef biodiversity via underwater soundscapes. Biological Conservation, 253, 108901.

Heard, J., Tung, W. C., Pei, Y. D., Lin, T. H., Lin, C. H., Akamatsu, T., & Wen, C. K. (2021). Coastal development threatens Datan area supporting greatest fish diversity at Taoyuan Algal Reef, northwestern Taiwan. Aquatic Conservation: Marine and Freshwater Ecosystems, 31(3), 590-604.

Wang, Z. T., Duan, P. X., Akamatsu, T., Wang, K. X., & Wang, D. (2020). Passive acoustic monitoring of the distribution patterns of Irrawaddy dolphins (Orcaella brevirostris) in the middle reaches of the Ayeyarwady River, Myanmar. Marine Mammal Science, 36(4), 1241-1253.

Lin, T., Chen, C., Watanabe, H., Kawagucci, S., Yamamoto, H., Akamatsu, T. (2019) Using soundscapes to assess deep-sea benthic ecosystems, Trends in Ecology and Evolution, 34(12), 1066-1069.

Tsujii, K., Akamatsu, T., Okamoto. R., Mori, K., Mitani, Y., Umeda, N. (2018.10) Change  singing behavior of humpback whales caused by shipping noise, PLOS ONE, 13(10), e0204112.

Iwata, T., Akamatsu, T., Thongsukdee, S., Cherdsukjai, P., Adulyanukosol, K., Sato, K. (2017) Tread-water feeding of Bryde’s whales, Current Biology, 27, R1154-R1155.

Wright, A.J., Akamatsu, T., Mouritsen, K.N., Sveegaard, S., Dietz, R., Teilmann, J. (2017) Silent porpoise: potential sleeping behaviour identified in wild harbour porpoises, Animal Behavior, 133, 211-222.

Kimura, S., Akamatsu, T., Dong, L., Wang, K., Wang, D., Shibata, Y. and Arai, N. (2014) Acoustic capture-recapture method for towed acoustic surveys of echolocating porpoises, J. Acoust. Soc. Am., 135, 3364-3370.

Richman, N.I. Gibbons, J.M., Turvey, S.T., Akamatsu, T., Ahmed, B., Mahabub, E., Smith, B.D., and Jones J.P.G. (2014) To see or not to see: investigating detectability of Ganges River dolphins using a combined visual-acoustic survey, PLOS ONE, 9(5), e96811.

Akamatsu, T., Ura, T., Sugimatsu, H., Bahl, R., Behera, S., Panda, S., Khan, M., Kar, S. K., Kar, C. S., Kimura, S., Sasaki-Yamamoto, Y., (2013) A multimodal detection model of dolphins to estimate abundance validated by field experiments, J. Acoust. Soc. Am., 134, 2418-2426.

Zhao, X., Wang, D., Turvey, S.T., Taylor, B., Akamatsu, T. (2013) Distribution patterns of Yangtze finless porpoises in the Yangtze River: Implications for reserve management, Animal Conservation, 16, 509-518, DOI: 10.1111/acv.12019.

Akamatsu, T. Wang, D. Wang, K, Li, S., and Dong, S. (2010), Scanning sonar of rolling porpoises during prey capture dives. J. Exp. Biol., 213, 146-152.

Akamatsu T.,  Nakamura K., Kawabe R., Furukawa S., Murata H., Kawakubo A., and Komaba M., (2010), Seasonal and diurnal presence of finless porpoises at a corridor to the ocean from their habitat, Marine Biology, 157, 1879-1887. 

Turvey, S.T., Pitman, R.L. Taylor, B.L., Barlow, J., Akamatsu, T., Barrett, L.A., Zhao, X., Reeves, R.R., Stewart, B.S., Wang, K., Wei,Z., Zhang, X., Pusser, L.T., Richlen, M., Brandon, J.R., and Wang,D., (2007), First human-caused extinction of a cetacean species?, Biology Letters, 3(5), 537-540. 

Akamatsu, T. Wang, D. Wang, K. and Naito, Y. (2005), Biosonar behaviour of free-ranging porpoises, Proc. R. Soc. Lond. B, 272, 797-801.




2020- Director, Policy Research Department, OPRI-SPF
2015-  Senior Researcher, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency
2000-  Senior Researcher, National Research Institute of Fisheries Engineering, Fisheries Research Agency
1999-2000 Visiting Scholar, University of Kentucky, U.S.A.
1997  Visiting Scholar, National Institute of Polar Research, Japan
1989-  National Research Institute of Fisheries Engineering


Nihon University         Ph.D.                1996                 Agriculture
Tohoku University       M.A.               1989                 Physic