Oh wearing his uniform as manager of the Japanese national team in 2006
Hand print of Sadaharu Oh
- In this Japanese name, the family name is Oh.
Sadaharu Oh (王貞治 Oh Sadaharu, born May 20, 1940), also known as Wang Chenchih (simplified Chinese: 王贞治; traditional Chinese: 王貞治,; pinyin: Wáng Zhēnzhì), is a Japanese-Taiwanese professional athlete. He is best known as a baseball player and manager.
Oh was born in Tokyo. He is the son of a Taiwanese father and a Japanese mother. Although Oh has always lived in Japan, he has always been a citizen of the Republic of China (Taiwan). 
Oh played for the Yomiuri Giants. In 1977, he set the world record for home runs.
Oh retired from playing in 1980.
From 1984 to 1988, he was the Giants' manager.
He managed the Fukuoka SoftBank Hawks from 1995 to 2008.
In 2006, he was the manager of the Japanese national team in the World Baseball Classic.