Pharma Stocks Drop as TrumpRx.gov Launched; Sumitomo Pharma -4.5%, Chugai -3.1%

Japanese pharmaceutical stocks fell sharply on February 6, 2026, following the launch of TrumpRx.gov, a U.S. website offering discounted prescriptions. The move, part of deals with 16 major drugmakers for most-favored nation pricing, prompted early Tokyo trading declines: Sumitomo Pharma -4.5%, Chugai Pharmaceutical -3.1%, and Takeda Pharmaceutical -1.5%. The sector shed 1.6% and became the second-worst performer on the Tokyo Stock Exchange's 33 industry sub-indexes.