Yōichi Sai (崔 洋一, Sai Yōichi, 6 July 1949 – 27 November 2022) was a Korean film director who worked in Japan.^[3][4] He was the president of the Directors Guild of Japan.^[5]

Sai was born on 6 July 1949 in Nagano Prefecture, Japan. His mother was Japanese and his father was Zainichi Korean.^[6]

Sai won the Best Screenplay award at the 11th Yokohama Film Festival for A Sign Days.^[7]

In 1999, he shot The Pig's Retribution, a film set in the lavish natural scenery of Okinawa, inspired by the 1996 Akutagawa Prize-winning eponymous novel by Eiki Matayoshi. The film won the Don Quixote prize at the Locarno International Film Festival in 1999.^{[citation needed]}

Sai directed Blood and Bones, a film starring Takeshi Kitano.^[8] He has also directed films such as Marks,^[9] Doing Time,^[10] Quill,^[11] Soo^[12] and Kamui Gaiden.^[13]

As an actor, Sai appeared in Nagisa Oshima's 1999 film Taboo^[14] and Masahiko Nagasawa's 2003 film The Thirteen Steps.^[15]

Sai's 2004 film Blood and Bones won four Japanese Academy Awards, including two for Sai himself, for Best Director and Best Screenplay. He had previously received two nominations in the same categories for All Under the Moon.^{[citation needed]}

Sai died of bladder cancer at his home in Tokyo, on 27 November 2022, at the age of 73.^[6]