Sounds of the kind called “Atmospheric Sound” in the field of video sound effects are also used to express the feelings and circumstances of characters. Although these are not sounds or sound effects of middle range which can not be called sound expression, there is no specific concept in the production technique, and systematic investigation classification etc has not been done about production method. In this research, we mainly focused on Japanese SF animation, and conducted a survey of 12 titles and 83scenes, mainly on contents since the 00's. As a result, the relation with the various editing techniques is deep as the video expression technique, and sound including abundant dissonance and non-integral next harmonic was abundantly used as the sound production technique. Furthermore, when compared with overseas contents, the use rate of electronic sound was remarkably high.