Written by: Jin Fujisaki / Published: 2026-02-24
The "ring notebook" — fold it back a full 360 degrees and you can write in tight spaces on a cramped desk or even while standing. Its convenience is undeniable, but it has had one fatal weakness. That is: "when you write near the edge of the page, the metal rings dig into your hand or arm and hurt (and make writing difficult)."
Kokuyo has brilliantly solved this long-standing frustration with their proprietary "Soft Ring" technology. The rings used in the "Sooofa" are made not of metal, but of "squishy, soft resin." Because of this, even when you rest your hand firmly on top of the rings while writing, the rings themselves deform and sink down with a gentle give, so there is absolutely no pain. The mobility of a ring notebook combined with the flat writing comfort of a bound notebook. It is a truly magical construction that perfectly fuses these two opposing benefits.
| Every Feature You Could Want, "All Included"
image Kokuyo
The Soft Ring technology itself is used in other Kokuyo products, but what makes this "Sooofa" special is that it covers every single feature that modern business professionals and students could want from a notebook.
First, the cover comes with a sturdy "elastic band," preventing the tragedy of the notebook accidentally flopping open in your bag and bending the pages. Furthermore, the back of the notebook is equipped as standard with a "PP clear pocket" where you can quickly tuck away stickers, business cards, receipts, and the like. The crowning touch is the perfectly placed "notch" near the rings on the cover. By hooking your pen's clip into it, you can unify your pen and notebook and carry them around smartly. With just this one notebook, there is no need to buy any extra accessories.
| The "4mm Grid" That Doesn't Disrupt Your Thinking, and the Beautiful "Perforations"
image PR TIMES
The inner pages are also packed with Kokuyo's extraordinary attention to detail. They use a "4mm grid," which is ideal not only as a guide for writing characters, but also for drawing diagrams, tables, and rough sketches of ideas. Being slightly finer than the standard 5mm grid, it offers an exquisite comfort for both those who want to densely pack in small characters and those who want to freely draw lines ignoring the grid.
Furthermore, every page features extremely fine "micro perforations" that make tearing easy. Whether you want to hand a memo to someone, dispose of a page where you made a mistake, or cleanly tear out a page to scan with your smartphone, being able to crisply detach a page with a satisfying tear becomes one of life's small daily pleasures.
| A Warm Design That Blends Into Cafes and Living Rooms
image Getnavi
The name "Sooofa" was chosen to evoke "the comfortable, relaxing feeling of lounging on a sofa." True to its name, the cover uses a PP material that is durable yet has a warm, matte texture, and it comes in a range of muted colors — warm gray, soft green, yellow, and light blue — that gently blend into your interior decor and fashion.
There is none of that "obviously stationery" office-supply feel; whether tossed casually onto a cafe table or onto your living room at home, it carries itself like a single, sophisticated lifestyle item.
| Summary: The Ultimate "Stress-Free" Experience for About 800 Yen
image LOFT
Pricing is 858 yen (tax included) for the portable B6 size, and 968 yen (tax included) for the A5 size that gives you plenty of writing space (※manufacturer's suggested retail price). It is a slightly premium price compared to a standard notebook, but if you can gain this overwhelmingly stress-free experience of "your hand doesn't hurt," "it won't open on its own," and "you can carry your pen and accessories together," it is unquestionably worth more than its price.
The "Kokuyo Sooofa" is the ultimate companion that overturns the very concept of a ring notebook from the ground up, and makes our thinking freer and more comfortable. To those who have avoided ring notebooks because "they're not for me," I especially want you to experience this "squishy" gentleness for yourself.
