Career
He was interested in high-profile crimes in Japan and published a number of non-fiction books about Japanese crimes. The novel became the basis of Shohei Imamura"s film Vengeance Is Mine. He also wrote the books about Norio Nagayama, Tsutomu Miyazaki, Fusako Sano and Futoshi Matsunaga.
In 1992, Saki published a book about Japanese Resident-General of of Korea Itō Hirobumi and Korean An Jung-geun, titled Itō Hirobumi to An Jung-geun.
On 1 November 2015, he died from throat cancer in Kitakyūshū at age 78.