Metabolomics, a field of research aimed at the comprehensive analysis of whole metabolites, is currently attracting substantial attention as an effective approach for high-resolution biochemical phenotyping. This attention comes because metabolomics can be used not only to identify simple metabolic variation but also to detect almost imperceptible changes in the living body, which would be difficult to recognize as a common phenotype by simultaneously expressing the relative proportions of multiple metabolites. Our group works on the development of various metabolomics technologies (e.g., sample preparation, instrumental analysis, and data mining) and the application of metabolomics research in a variety of fields, concentrating particularly on its use in medicine. Additionally, we energetically conduct transomics (also known as “multi-omics”) research, which involves integrated analysis of data from metabolomics and other omics research, including genomics and proteomics.