The frontal prism in the Japan Trench on the 2011 Tohoku‐Oki earthquake (Mw 9.0, March 11, 2011) rupture zone had been drilled during the Integrated Ocean Drilling Program (IODP) Expeditions 343 and 343 T. We investigated fossil diatoms and radiolarians to determine age constraints on the cored sediments and reveal the behavior of sediment deformation history. Although diatoms and radiolarians abundances are varied in samples...

Underwater object detection is crucial in marine exploration, presenting a challenging problem in computer vision due to factors like light attenuation, scattering, and background interference. Existing underwater object detection models face challenges such as low robustness, extensive computation of model parameters, and a high false detection rate. To address these challenges, this paper proposes a lightweight underwater ob...

To understand the sedimentary development of the Boso Forearc Basin, central Japan, since ~ 3 Ma, we investigated paleothermal structure and consolidation trends in the central and eastern parts of the forearc basin through vitrinite reflectance measurements and consolidation tests. Vitrinite reflectance (R m ) was in the range 0.33 % to 0.61 % for the Miura Group in the central part of the forearc basin and 0.34 % to 0.41 % f...