Yasushi draws his artwork with the motif of incorporating various substances contained in the atmosphere and the concept of ‘we are living with the visible and invisible thing together in our life’. The reason why he uses this motif in his artwork is that he was having asthma and sensitive to contaminated air and clear air. Further, the reason why he uses his concept is that he used to interested in the magic and diorama model. ‘There are lots of things and events happening which are not in front of us’. He realizes this concept and put it into his artworks.