| Tatsuaki Iwata | |
| Fullname: | Tatsuaki Iwata |
| Kanji: | 岩田達明 |
| Birth Date: | 2 January 1926 |
| Birth Place: | Nagoya, Japan |
| Residence: |  Nagoya, Japan |
| Teacher: | Kitani Minoru |
| Turnedpro: | 1943 |
| Rank: | 9 dan |
| Affiliation: | Nihon Ki-in |
,[1] also known as Masao Iwata, was a Japanese professional Go player.[2]
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.[3] He died in 2022 at the age of 96.[4]
| Title | Years Held | |
|---|---|---|
| Current | 6 | |
| Okan | 1967, 1969, 1970, 1976, 1979, 1980 |
| Title | Years Lost | |
|---|---|---|
| Current | 6 | |
| Okan | 1965, 1972, 1977, 1981, 1985, 1989 |