Jangma(장마) is the Korean word, meaning the rainy season which happens in early or mid summer. It is called Meiyu in China, Baiu or Tsuyu in Japan, written in the same Chinese character(梅雨), which means the rain-fall in late spring or early summer of Japanese-apricot riping season.
This article starts with the observations on the two words that denotes the same meteorological phenomenon(clause I). Then it investigates the difference in actual regional deployment of rainy season between Korea and Japan based on daily meteorological statistics(clause Ⅱ), and the way how climatic conditions are embodied in the main character of Korean agriculture(clause Ⅲ). Finally, it reveals how Japanese meteorologists and agriculturalists in colonial Korea cognized the different climatic conditions, and were coerced to adapt to such a natural environment(clause Ⅳ).
this article maintains that, in historical process, extension of the paddy-field agriculture is supplemented by intensification of the dry-field cropping, characteristic in semi-dried area such as the Korean Peninsula. It also maintains that colonial encounter is the mutual transforming process. This intends to criticize the arguments that erase the climatic and technological difference between Korea and Japan, which is advocated not only by some meteorologists but also by colonial modernization theorists.