| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
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| Outline of Final Research Achievements |
Plastic waste flowing into the ocean has a serious impact on ecosystems. This study investigated the deep-sea areas around Japan, revealing that the seafloor off the Boso Peninsula (at a depth of about 5800 meters) has plastic waste accumulated at densities a hundred times (for macroplastics) to several thousand times (for microplastics) higher than other sea areas. It is surmised that vortices in the surface layer of the sea aggregate these wastes and directly transport them to the seafloor. Furthermore, it has been confirmed that the degradation of plastics is extremely slow in the deep-sea environment.
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