Data for: Sr-Nd-Pb isotope systematics of fine river sediments in southwest Japan: Indications for sediment provenance of the Northwest Pacific

Sr-Nd-Pb Isotope ratios of fine river sediments in SW Japan with compilation of Sr-Nd-Pb isotope ratios of basement rocks in Japan, desert sediments in China, river sediments in China and Taiwan, and seafloor sediments in the North Pacific reported by several authors.