I believe this is a shikishi board from the Yujiro Ishihara Memorial. I don't know the details, but I'm offering it for sale to someone who appreciates it. There is some staining on the back of the shikishi board due to the passage of time. The surface is clean, but there is some warping at the bottom. I would appreciate it if someone who is not overly concerned about these imperfections would purchase it.