Apica's signature "Gentleman's Notebook," a set of 4 notebooks. These are top-of-the-line notebooks. They offer a smooth writing experience with both fountain pens and ballpoint pens. The following is from the Apica website: ↓ 〈What is the Gentleman's Notebook?〉 Gentlemen and ladies who never neglect consideration, even in the smallest details. For example, such attention to detail extends to the notebooks they use every day. "Premium C.D. NOTEBOOK (Gentleman's Notebook)" is a notebook that fulfills the desires of adults. 〈Gentleman's Commitment.1〉 Silky Smooth Writing Feel The body paper uses "A.Silky 865 Premium," original writing paper developed specifically for the Premium C.D. NOTEBOOK. It features a high-quality, smooth writing feel that allows you to write smoothly with both fountain pens and ballpoint pens. 〈Gentleman's Commitment.2〉 Ease of Opening and Writing Comfort We also focused on ease of opening, adopting "thread-stitched binding" that allows the notebook to lay flat and be easy to write in. The binding thread uses colored thread that matches the cover color as a subtle accent. 〈Gentleman's Commitment.3〉 Extensive Size and Rule Lineup We have expanded the size and rule lineup to accommodate a lot of "writing" and "drawing." The simple ruled lines can be used for various purposes and in various situations. The "C.D. NOTEBOOK," a university notebook released in 1987, is a long-selling product that can be called Apica's signature. The "Premium C.D. NOTEBOOK" was released in 2012, marking its 25th anniversary. This notebook, positioned as the premium line of the standard "C.D. NOTEBOOK," is a notebook that we want you, as an adult, to use. In this modern era where digitalization is advancing and writing by hand is becoming less frequent, we believe that what we can do is to continue conveying the importance of writing on paper through the creation of high-quality notebooks.