Yasuaki Tsukada (塚田 泰明, Tsukada Yasuaki; born November 16, 1964) is a Japanese professional shogi player ranked 9-dan. He is a former Ōza title holder and the inventor of the influential Tsukada Special strategy, which he used to win numerous games in the 1980s, is named after him.
Source: “Yasuaki Tsukada”, English Wikipedia (CC BY-SA 4.0), excerpt