[1] Oki was playing lead role in Toshiya Fujita's film " Wet Sand in August" but was forced to drop off in a motorcycle accident while shooting.

[2] He gradually won popularity through his roles in television dramas such as Hissatsu series and Taiyo ni Hoero!.

[3] In 1979, Oki played lead role in Oretachi wa Tenshi da!

Yonoi in Nagisa Oshima's film in Merry Christmas, Mr. Lawrence but he had to step down because of his illness.

[6] He ended his life by leaping from the top of a 47-story building, the Keio Plaza Hotel.