The more people became permanently settled following the development of a culture based on agriculture (see the articles of Agricultural people or Farming) the larger and more permanent fireplaces became by combining mud and stones, and others, in the process of which the cooking furnace was formed.
農耕文化の発達（→農耕民族・農業）に伴う人の定住化とともに、次第に土と石を組み合わせるなどして炉も常設化・大型化していったが、その過程でこの竈になったと考えられる。