Shiki is a city located in Saitama Prefecture, Japan. As of 1 January 2021, the city had an estimated population of 76,445 in 35,407 households …Shiki is a city located in Saitama Prefecture, Japan. As of 1 January 2021, the city had an estimated population of 76,445 in 35,407 households and a population density of 8400 persons per km². The total area of the city is 9.05 square kilometres.