Tanso Biosciences

Tanso Biosciences is a private Japan-based biotech and drug discovery services company focused on G protein-coupled receptor (GPCR) biology. The company commercializes a proprietary high-sensitivity GPCR functional assay platform that supports panel assays, concentration-response studies, off-target profiling, orphan receptor analysis, and custom assay development. Its platform covers hundreds of validated human and mouse GPCR targets, including difficult Gi/o- and G12/13-coupled receptors, and is used by pharmaceutical, biotech, food industry, and academic customers. Tanso originated as an academic spin-off from researchers at The University of Tokyo and operates under an exclusive license to core assay-related intellectual property from the university. The business appears centered on enabling and de-risking early-stage GPCR drug discovery rather than advancing a disclosed internal therapeutic pipeline.