Fukuoka Prefecture Kasuya has a humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall.

After the Meiji restoration, the villages of Okawa and Nakabaru were established with the creation of the modern municipalities system on April 1, 1889.

Kasuya has a mayor-council form of government with a directly elected mayor and a unicameral town council of 16 members.

In terms of national politics, the town is part of the Fukuoka 4th district of the lower house of the Diet of Japan.

After that, an industrial park was established; however, the main focus of the local economy is on commerce with an increasing percentage of the working population commuting to nearby Fukuoka.