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Mattō (松任市 Mattō-shi) was a city located in Ishikawa Prefecture, Japan.
As of 2003, the city had an estimated population of 66,520 and a population density of 1,109.96 persons per km². The total area was 59.93 km².
On February 1, 2005, Mattō, along with the towns of Mikawa and Tsurugi, and the villages of Kawachi, Oguchi, Shiramine, Torigoe and Yoshinodani (all from Ishikawa District), was merged to create the city of Hakusan and no longer exists as an independent municipality.
The city was founded on October 10, 1970.
- ^ "野々市町5万人達成 11月市制施行". Hokkoku Shimbun website (in Japanese). Hokkoku Shimbun. Retrieved 6 September 2011.