[I]nvestigators searched the…head office of printing firm Sanyo-CYP…on suspicion it neglected its duty to take proper care of its workers’ health, after 17 developed bile duct cancer, eight of whom died…The workers at Sanyo-CYP were exposed to chemicals…The bureau…plans to file a report on the printing company and its senior officials with prosecutors …Sanyo-CYP has acknowledged it failed to appoint either an industrial physician or a safety and health supervisor as required by law…[A] report…suggest[ed] an organic compound…might have caused the bile duct cancer….Sanyo-CYP…said it had no knowledge of any causal relationship between…bile duct cancer and the chemical substance …[P]rinting firm workers in Osaka, Miyagi, Tokyo, Shizuoka and Ishikawa prefectures have been confirmed to have [also] contracted bile duct cancer.