[2][3] He spent his early youth in Nakashibetsu City and later moved to Sapporo where he attended Tsukisamu High School.
[citation needed] In his novel ja:真夜中の遠い彼方 Mayonaka no tooi kanata (later re-titled to ja:新宿のありふれた夜 Shinjuku no arifureta yoru), he depicts the underground lifestyles of the Japanese mafia, boat people, and illegal alien workers.
In ja:夜にその名を呼べば Yoru ni sono na o yobeba, Sasaki portrays a chilling Cold War scene in a mystery set in Otaru, Hokkaido and Berlin, Germany.
His police mystery thriller, ja:歌う警官 Utau keikan (later re-titled to ja:笑う警官 Warau keikan) was adapted for the big screen and provides an early setting for his later internationally acclaimed roman-fleuve novel ja:警官の血 Keikan no chi which was eventually adapted for television.
Sasaki's ja:ベルリン飛行指令 Berlin hikō shimei (English title: Zero Over Berlin) garnered critical acclaim for telling a World War II story from the Japanese perspective; it focuses on a fly-by-night mission involving a Type Zero Fighter (Mitsubishi A6M Zero) secretly making its way from Japan all the way to Berlin at the request of the Luftwaffe.