Since 1981, YAMAGAMI Tetsujiro has produced a series of documentaries by TSUCHIMOTO Noriaki which dealt with Minamata disease. He founded Siglo, Ltd. in 1986 and produced over 60 documentaries and 20 fiction films. He has also received various film awards, including a Special Mention at the Hujimoto Awards and a Silver Bear at the Berlinale.