Ryōichi Okamoto, ed., *Various Studies on Osaka Castle*, Meicho Shuppan, 1982, first edition. The outer box shows signs of aging, but the contents are in good condition. Includes attached illustrations. Toshiro Matsuoka, *The History and Structure of Osaka Castle*, Meicho Shuppan, 1988, first edition. The outer box shows signs of aging, but the contents appear to be in good condition. Includes attached illustrations. As I am a working person, I may often only be able to work on weekends, so please understand.