towns, 17 villages) October 2, 1942 - The town of Shinminato was merged into the city of Takaoka. (2 towns, 17 villages) January 1, 1951 - The town of Shinminato, and the village of Makino (both re-founded) were split from the city of Takaoka. (3 towns, 18 villages) April 4, 1951 - The town of Shinminato was elevated to city status. (2 towns, 18 villages) April 4, 1951 - The village of Makino was merged into the city of Takaoka (for the 2nd time). (2 towns, 17 villages) April 1, 1953 - The villages of Sakudo, Kataguchi, Horioka, Ebie, Shichibi, and Motoe were merged into the city of Shinminato. (2 towns, 11 villages) October 5, 1953 - The village of Tsukahara was merged into the city of Shinminato. (2 towns, 10 villages) November 15, 1953 - The village of Kanayama was merged into the town of Kosugi. (2 towns, 9 villages) December 1, 1953 - The village of Oe was merged into the town of Kosugi. (2 towns, 8 villages) March 1, 1954 (2 towns, 3 villages) The town of Daimon and the villages of Kushida, Azai, Mitota, and Futaguchi were merged to create the town of Daimon. The village of Rota was merged with the villages of Kureha, Nagaoka, and Samue (all from Nei District) to create the town of Kureha (in Nei District). March 27, 1954 - The village of Kurokawa was merged into the town of Kosugi. (2 towns, 2 villages) April 1, 1959 - The village of Kosugi had added parts of the village of Iketa (from Nei District). April 1, 1969 - The village of Ōshima was elevated to town status. (3 towns, 1 village) November 1, 2005 - The towns of Daimon, Kosugi and Ōshima, and the village of Shimo were merged with the city of Shinminato to create the city of Imizu. Imizu District dissolved as a result of this merger. References Former districts of Toyama Prefecture