A ring notebook that uses the KOKUYOs uniquely developed “new sensation soft ring”. The ring notebook is easy to write because it opens flat, and you can fold it flat to use comfortably even in tight spaces. It is a new standard notebook. The ring shape is "D-shaped", so the ring width is compact and not bulky. Edge title fields on which the date and title can be written are attached to both ends of the double-page spread, so by writing the date and title on the edge, it becomes a headline, and you can quickly find the record you want to see. Since the date and title serve as a guide for the beginning of a sentence, you can organize them neatly even if you write multiple projects on one page. The next matter can be started even in the middle of the page, so there is no unnecessary margin.