“Preservation of biogenic opal-A in earliest Cretaceous radiolarian claystone from the western Pacific”, Journal of Sedimentary Research, Section A: Sedimentary Petrology and Processes, vol. 68, pp. 435–439, 1998.
, “Temporal changes of cracks in the oceanward slope of northern Japan Trench off Sanriku: Six-year observation by submersibles”, JAMSTEC Journal of Deep Sea Research, pp. 445–454, 1999.
,