Research Fellow
Ocean Policy Research Institute of The Sasakawa Peace Foundation

Dr. Toyoshima specializes in marine biodiversity conservation and coral reef ecology. She received her master’s degree from University of Hawai’i for her research related to the mechanism of coral bleaching, and her doctorate degree from Tokyo Institute of Technology, for her research on the impacts of marine tourism on coral reef ecosystems. Previously, she worked for Okinawa Churaumi Aquarium, where she developed various educational programs for visitors and local school students, and for the Ministry of Environment of Japan, where she engaged in national marine park management and conservation, coral reef monitoring and assessment, water quality and sediment monitoring, educational programs with local schools, community outreach programs, and coral reef restoration projects. Subsequently, she worked for the Japan Wildlife Research Center and engaged in development of the national action plan to protect coral reefs in Japan. She worked for PADECO Co. Ltd., an international development consulting firm, from 2009 to 2019.


Coral reef ecology, sustainable tourism, biodiversity conservation, marine plastic litter, Arctic research


No Results Found


Junko Toyoshima, Iwao Fujii, Miko Maekawa, Tomohiko Tsunoda, Noriko Kamada, Hiroka Hidaka, Yasuhiro Tojo, Kazuko Ikeda (2022) Assessing effectiveness of satoumi activities in Japanese coastal areas from ecological and socioeconomic perspectives. Ocean & Coastal Management, 230, doi:10.1016/j.ocecoaman.2022.106354

Abe, K., Romppanen, S., Toyoshima, J., and Shibata, A. (2021) Arctic marine plastic problems: Potential collaborative research between international law and marine sciences. ArCS II International Law Briefing Paper Series, No.1 

Toyoshima, J. (2016) Doctoral Dissertation: Anthropogenic impacts of scuba diving tourism on the coral reef ecosystems and management of the impacts in the coastal areas of Japan. Dissertation. Tokyo Institute of Technology 

Toyoshima, J., & Nadaoka, K. (2015). Case studies of conflict resolution processes between fisheries and marine tourism in coral reef areas of Japan and possible application of payment for ecosystems services (PES). Journal of the Japanese Coral Reef Society 18: 11-24 

Toyoshima, J., & Nadaoka, K. (2015). Importance of environmental briefing and buoyancy control on reducing negative impacts of SCUBA diving on coral reefs. Ocean & Coastal Management, 116, 20-26 

Santos, S. R., Toyoshima, J., & Kinzie III, R. A. (2009). Spatial and temporal dynamics of symbiotic dinoflagellates (Symbiodinium: Dinophyta) in the perforate coral Montipora capitata. Galaxea, Journal of Coral Reef Studies, 11(2), 139-147 







2009-2019 PADECO Co., Ltd. 


Ph.D., Tokyo Institute of Technology, Department of Information and Communications Engineering, School of Engineering
M. Sc., University of Hawai’i at Manoa, Department of Zoology, Specialization in Ecology, Evolution and Conservation Biology
B. A., International Christian University, College of Liberal Arts (major in biology)