Iwao Yamazaki (???, Yamazaki Iwao, 16 September 1894 – 26 June 1968) was a lawyer, politician and cabinet minister in the early Showa period of Japan.
His brother, Tatsunosuke Yamazaki was also a politician and cabinet minister, and his nephew Heihachiro Yamazaki was later a prominent member of the post-war Liberal-Democratic Party.
English: Japanese book "The history of Tokyo Metropolitan Police Department Vol.3: Pre-war Showa era" published by Tokyo Metropolitan Police Department.