Western boundary currents play a major role in redistributing heat and influencing regional climate systems. The Kuroshio Current Extension (KCE) region of the northwest Pacific is characterized by strong hydrographic gradients and high biological productivity, yet its long-term behavior under warmer than modern conditions remains incompletely understood. Sediments recovered from Shatsky Rise during Ocean Drilling Program (ODP) Leg 198 provide expanded and relatively continuous Late Neogene carbonate sequences located near themodernmean latitude of theKCE. Here, we present coarse-fraction (>63 mm) and fine-fraction (<63 mm)measurements fromweight percent data generated from Holes 1207A, 1208A, and 1209A. These measurements across the KCE during the mid-Piacenzian Warm Period can provide context for interpreting bottom water strength, surface ocean processes, surface to deep ocean productivity changes, and other regional paleoceanographic processes, especially when paired with other datasets. Coarse-fraction values range from 1.2% to 51.6%, whereas fine-fraction values range from 48.3%to 98.8%at all sites.
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