Arturo Berned (Madrid, 1966) is an architect and sculptor who has spent years researching and experimenting with shapes and materials and whose work has been exhibited in numerous exhibitions worldwide. Between 2013 and 2014 it takes places in Japan the Dual Year Spain-Japan, and in this framework, and in collaboration with the architect Toyo Ito, the Grin Grin Park of Island City, Fukuoka, hosts an exhibition project, whose works and production and assembly process are collected in this book. MU, the project name, is a Japanese term that refers to a blank paper, an open attitude without preconceptions or prejudices: a tribute of Berned to Japan and its people. The sculptures will be integrated into the gaps between the pond and the greenhouse of the park, joining a new path to existing one while talking with the building. Besides, one of them will be permanently located at the Embassy of Spain in Tokyo