Music for Nine Post Cards jako przykład kankyo ongaku, czyli „muzyki unoszącej się w powietrzu jak dym”

The aim of the article is an attempt to present the genesis and describe the first compositions that formulated the Japanese ambient trend, i.e. kankyo ongaku. The subject of the research is both the history of the creation of the series by Hiroshi Yoshimura, Music for Nine Post Cards, which became the cornerstone of later albums from the ambient and minimal music trend in Japan, as well as individual works included in the cycle under study. Based on the results of the automated and auditory analysis of Music for Nine Post Cards, the structure of musical works and their stylistic features are determined. For automated analysis, Sonic Visualiser was used-an application used to create a graphical visualisation of the music content of audio files. As a result of the research, the answer was obtained as to how Hiroshi Yoshimura and Satoshi Ashikawa realised the original assumptions of kankyo ongaku.