Namerikawa has a humid continental climate (Köppen Dfa) characterized by mild summers and cold winters with heavy snowfall.

[4] Per Japanese census data,[5] the population of Namerikawa has remained relatively steady over the past 50 years.

The town of Namerkawa was created within Nakaniikawa District, Toyama with the establishment of the modern municipalities system on April 1, 1889.

On November 1, 1953, Namerigawa merged with the neighboring villages of Nakakazumi, Higashikazumi, Nishikazumi, Kitakazumi, Hamakazumi and Hayatsukikazumi.

Namerikawa has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 15 members.