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In recent years, various catastrophic disasters have increased in Japan. In coastal areas, heavy rains and tsunamis tend to cause enormous damage. Because large vessels cannot enter the port, rescue operations are delayed more than expected. Therefore, it is important to develop a reliable device for discovering shipping lanes and ensuring a safe route for prompt rescue activities. In this research, we have created an underwater robot that can be applied for this purpose at the early stage right after disasters. Disaster-relief drills were conducted in Kagoshima Bay to examine its effectiveness. Fishery high school students manufactured, operated, and repaired the robot using the knowledge they had learned in classes. [ABSTRACT FROM AUTHOR]

Tokyo Electric Power Company, TEPCO, has started tritiated water release into the Pacific Ocean. In order to reduce unreasonable rumor caused by tritium release, flounder, abalone, and sarggasum were exposed to tritium enriched seawater, and time dependent Tissues Free Water Tritium (TFWT) concentration was measured. Estimating the concentration of Organically Bound Tritium (OBT) is important to assess tritium impact because it has a longer biological half-life than TFWT. Current models estimate OBT concentrations using TFWT concentration. Understanding equilibration time is critical for making accurate TFWT concentration predictions. TFWT intake rate was analysed by the compartment model., (© The Author(s) 2024. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)