Long-term storage item from my home. Lecture notes from a self-organized public lecture series held at the University of Tokyo over a 15-year period starting in 1970. 【Condition】 Comes with a vinyl cover, but there is yellowing, discoloration, and stains. The text inside is in good condition. Please understand that this is a used book. I have carefully inspected the item before listing it, but as it is a home-stored item, please refrain from purchasing if you are concerned about minor details or if you are looking for a new item.