Biogen Hong Kong Ltd 20/F, One IFC 1 Harbour View Street Central Hong Kong. Tel: 2588 3483 . Japan . Biogen Japan Ltd. Nihonbashi 1-chome Mitsui Building 14F 4-1, Nihonbashi 1-chome Chuo-ku, Tokyo 103-0027 Japan. Phone: +81 3 3275 1900 Fax: +81 3 3275 1910. Affiliate website; Korea . Biogen Korea LLC Level 23, International Finance Center Seoul ....