Interesting book on Yokohama by Takuma Nakahira : Degree Zero. The book has been release upon the retrospective at the Yokohama Museum of Art in 2003. Here some words from Takuma Nakahira: "I believe that photography is neither creation nor memory, but documents. The act of shooting a photograph is not something abstract. It is always concrete. No manipulation to make simple things complicated through conceptualization. Only the real I encountered through the medium of the camera is here in my photographs."