This paper introduces a design method using psychophysiological research output as an inspiration means for the design of products taking user's Kansei highly into consideration. The development of this method is itself a part of a series of design methods based on the collaboration of the research fields of psychophysiology and design. As case studies, two design projects following this process are introduced. Firstly, the colourful rain umbrella lets its user to experience grapheme-colour synaesthesia. Secondly, the sensorial socialising smartphone informs about the user's digital social network activity by the means of warmth, a non-invasive tactile technique. Informed by psychophysiological literature, this design is shown to be not only informational of the network activity, but also motivational towards greater social experience. This approach enables psychophysiology not only to inform and support design ideation, but also to enrich the value of the design concept by bringing new arguments.