The building where the galleries, APS and Platform Studio, are housed was built in 1932. It is the oldest, apartment building that exists in Japan today. One of the exhibition spaces APS is painted in pure white. On the other hand, the walls in Platform Studio expose their rough texture without any paint. My aim was to encompass those walls as part of my artwork. I exhibited two paintings on the left wall of Platform Studio. In creating thepaintings, I first pasted pieces of yellow masking tape, and then applied water-based varnish and gold pigment. The parts protected with the pieces of tape expressed a negative element. That negative element (that is, thepieces of tape) was removed from the paintings and then pasted onto the wall on the opposite side so that they could reveal the mirror image of the paintings. The pieces of tape that were pasted directly on the uneven wall surface shined in gold due to the effect of the lighting. The installation work in its entirety repeatedly reversed the negative and positive elements.