Wajima is a city located in Ishikawa Prefecture, Japan. As of 31 January 2018, the city had an estimated population of 27,698 in 12768 house…Wajima is a city located in Ishikawa Prefecture, Japan. As of 31 January 2018, the city had an estimated population of 27,698 in 12768 households, and a population density of 65 persons per km². The total area of the city was 426.32 square kilometres.