10.1594/PANGAEA.994126Ota, HayuHayuOta0009-0001-7029-2067Atmosphere and Ocean Research Institute, The University of TokyoKuroda, JunichiroJunichiroKuroda0000-0002-2218-4854Atmosphere and Ocean Research Institute, The University of TokyoOrihashi, YujiYujiOrihashi0000-0001-7715-3847Faculty of Science and Technology, Graduate School of Science and Technology, Hirosaki UniversitySchmitz, Mark DMark DSchmitz0000-0003-2888-0321Department of Geosciences, Boise State UniversityTakashima, ReishiReishiTakashima0000-0003-1830-6887The Center for Academic Resources and Archives, Tohoku University MuseumZircon U-Pb age data from a tuff sample (KRP072) of the Kawaruppu sectionPANGAEA2026Cretaceous-Paleogene boundaryEast AsiaIODP³Osmiumzircon U-Pb geochronologyEvent labelSample code/labelSECTION, heightMain LithologyThorium/Uranium ratioLead-206Lead, radiogenic/Lead ratioLeadLead-206/Lead-204 ratioLead-208/Lead-206 ratioLead-207/Lead-206 ratioLead-207/Lead-206 ratio, error, relativeLead-207/Uranium-235 ratioLead-207/Uranium-235 ratio, error, relativeLead-206/Uranium-238 ratioLead-206/Uranium-238 ratio, error, relativeCorrelation coefficient, isotope ratio errorLead-207/Lead-206 ratio, errorLead-207/Uranium-235 ratio, errorLead-206/Uranium-238 ratio, errorOutcrop sampleCalculatedZircon U/Pb dating by chemical abrasion–isotope dilution–thermal ionization mass spectrometry (CA-ID-TIMS)2015-08-27T00:00:00/2024-08-24T00:00:00Dataset10.1038/s43247-026-03602-z132 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset contains zircon U-Pb age data from a tuff sample (KRP072) collected at the Kawaruppu section, Nemuro Group, Hokkaido, Japan. The sample derives from the Upper Cretaceous-lower Paleogene succession investigated for stratigraphic assessment of the Cretaceous-Paleogene boundary interval. Zircon U-Pb analyses were performed by chemical abrasion-isotope dilution-thermal ionization mass spectrometry (CA-ID-TIMS) at Boise State University (BSU) Isotope Geology Laboratory.143.7273507143.731687443.0980550743.0987835Hokkaido, JapanJapan Society for the Promotion of Sciencehttps://doi.org/10.13039/50110000169117K05674High resolution age model and paleoenvironmental change for K/Pg boundaryJapan Society for the Promotion of Sciencehttps://doi.org/10.13039/50110000169118KK0091Improvement of Cretaceous Geologic Time ScaleJapan Society for the Promotion of Sciencehttps://doi.org/10.13039/50110000169121H04503Environmental changes during the Latest Cretaceous Mass Extinction Event recorded in the complete K/Pg boundary sequence discovered firstly in East AsiaJapan Society for the Promotion of Sciencehttps://doi.org/10.13039/50110000169122H01342The Cretaceous-Paleogene Boundary in the Southern Hemisphere: Osmium isotopic record to fingerprint flood basalt volcanismJapan Society for the Promotion of Sciencehttps://doi.org/10.13039/50110000169122K18426Linkage of the Earth's tipping points and the subseafloor biosphereJapan Society for the Promotion of Sciencehttps://doi.org/10.13039/50110000169123H00153Analysis of internal Earth nitrogen using pupulin nitrogen isotope ratioJapan Society for the Promotion of Sciencehttps://doi.org/10.13039/501100001691JPJSCCA20250004Warm-period Climate Change Research Center with the International Ocean Drilling School [WarmCCR]