Belgium Astellas Pharma B.V.

Leaders from Yamanouchi and Fujisawa shake hands, marking the 2005 merger that formed Astellas and shaped a patient-first global strategy. Astellas was established in April 2005 through the merger of two companies – Yamanouchi Pharmaceutical (founded in 1923) and Fujisawa Pharmaceutical (founded in 1894).

In April 2025, Astellas celebrated our 20th Anniversary as a company. Astellas was established in April 2005 through the merger of two companies – Yamanouchi Pharmaceutical (founded in 1923) and Fujisawa Pharmaceutical (founded in 1894). The merger brought together Yamanouchi's strengths in urological medications and chemical synthesis and Fujisawa's excellence in the transplant/immunology area and fermentation technology, forming an ideal complementary partnership.