JSR Life Sciences, LLC

The company develops and supplies highly functional materials, products, and integrated services for the biopharmaceutical industry. Key offerings include proprietary chromatography resins such as the Amsphere series for protein A purification in antibody drug manufacturing, as well as tools and technologies supporting drug discovery, biologic development, in vitro diagnostics, and medical devices. Through affiliates like Crown Bioscience (a global oncology and immuno-oncology CRO) and KBI Biopharma (a CDMO with advanced analytical capabilities), it delivers end-to-end solutions that help partners de-risk molecule selection, accelerate development timelines, and improve clinical success rates.

Headquartered at 1280 North Mathilda Avenue in Sunnyvale, California, JSR Life Sciences maintains a global footprint with facilities, laboratories, and offices in Japan (Tokyo and Tsukuba), Belgium (Leuven), China (Beijing), and other locations. It operates as part of JSR's life sciences division, leveraging the parent company's expertise in performance materials while focusing on biotechnology applications. The entity serves pharmaceutical, biotech, and academic customers worldwide.

In November 2026, as part of Mitsui Chemicals' announced acquisition of JSR Corporation, JSR Life Sciences, LLC was identified as one of the affiliated companies that will become a specified subsidiary of Mitsui Chemicals upon completion of the transaction. This positions it within a larger chemical industry group while maintaining its focus on life sciences innovation.