, also known as Masao Iwata, was a Japanese professional Go player. Biography Iwata was a 9-dan Go professional from the Nagoya branch of the Nihon Ki-in. He won his 800th professional game in 2004. He retired from tournament play in 2011. He died in 2022 at the age of 96. Promotion record Titles & runners-up See also International Go Federation List of Go organizations List of professional Go tournaments References 1926 births 2022 deaths Japanese Go players Sportspeople from Nagoya