HONG KONG – With the sale of a group of noncore assets to a little-known Chinese company, Takeda Pharmaceutical Co. Ltd. took another step in a multibillion-dollar string of divestitures that is part of a plan to cut debt and focus on five key business areas. Takeda announced on Dec. 21 the sale of a portfolio of noncore prescription drugs marketed in China to Hasten Biopharmaceutic Co. Ltd. (China).