Thousand Oaks-based biotech giant Amgen said late Monday that it is donating $1M to the Japanese disaster relief efforts. Amgen said the funds will go to Direct Relief International and the International Medical Corps. The funds come both from Amgen and the Amgen Foundation. The firm said it has longtime links to Japanese companies, and particularly its partnerships with Kirin Holding, Kyowa Hakko Kirin, Takeda Pharmaceuticals, and Daiichi Sankyo.