At the end of 2015, I was asked to express the possibilities of clay and tiles in Making GAUDI, the INAX Live Museum’s 10th anniversary special exhibition, together with Naoki Kusumi, the best sakan (craftsperson of Japanese plasterwork) of our time. To be honest, I did feel that if Naoki Kusumi was the representative of soil, I was the representative of tiles, and that I had finally reached the pinnacle of tile craftsmanship. The main idea of the exhibition was to show the process of creating works inspired by Gaudi’s unfinished architecture, Church of Colonia Güell. In June 2016, Kusumi and I travelled to Barcelona to see Gaudi’s architecture and deepen our understanding of how plastering and tiles can coexist, and what challenges we can take on. Tiles require clay to be fired, which means a long preparation period, whereas plastering can be mixed on-site and change its expression spontaneously. We ran through the production process together from the opening in November 2016 to the completion in March 2017, during which I designed and installed the tiles and Kusumi responded and plastered around them. Both the possibilities of tiles and the freedom of plastering were highly appreciated, but I became captivated by the plastering and Kusumi seemed to have become captivated by the tiles. This exhibition led to a joint studio with Kusumi. This ally of mine, Naoki Kusumi, with whom I share a passion for creation, makes me realise that there is no such thing as the pinnacle of craftsmanship.