Tsuno District, YamaguchiTsuno was a district located in Yamaguchi Prefecture, Japan.Towns and villages KanoMerger On April 21, 2003 - The town of Kano, along with the cities of Tokuyama and Shinnan'yō, and the town of Kumage, was merged to create the city of Shūnan. Tsuno District was dissolved as a result of this merger.