Kokuyo Campus Slide Binder, Adapt Slim, Double Pockets, A4, 30 Holes, Up to 65 Sheets, Transparent, Japan Import (RU-AP171T)

Another excellent Kokuyo binder, with super high quality paper. It holds up and provides good protection when squeezed into my backpack with a heavy laptop and other notebooks. It lays flat when wide open and when folded inside out. I have added filler paper twice.

Love the style of these binders! I’ve struggled so much with binders in the past. The three holed one always had pages falling out easily cause of rips when you weren’t careful. But not these! I haven’t had a single page fall out while using it for multiple semesters. It has also stayed in tact well. Really hasn’t gotten damaged at all and I’ve had it for about 2 years now! Love the unique look of the bindings as opposed to traditional ones. Although it’s thin it can hold a lot of pages also! I can’t get enough of this binder!

and they work for me. Sometimes the opening (slide) mechanism sticks a little bit (I don't know why) and it helps to close it and try opening it again. Don't force it; it IS plastic, after all. But that is a small concern for me because I am routinely careful with it. These are advertised as holding 65-100 sheets of paper, and I think both are accurate, depending on what thickness of paper you're putting in them. I suspect it will hold about 100 sheets of Kokuyo Business paper, since it is noticeably thinner than most other papers, and closer to 65 sheets of Kokuyo Campus Sarasara paper.

The binder looks and functions exactly like described here, and I was really glad to find the A4 size, but for how much you're paying for a binder (granted, a very nice binder but still just a binder) I'd expect it to come in better condition. I'm not sure if it just got bumped around on the journey over here or if it had been opened prior but mine arrived with very small marks--they came off after I cleaned the binder with baby wipes but in the age of Covid-19 I really didn't like the thought of someone opening up the packaging on the binder I'd just bought. After giving it a good wipe down though, it functions beautifully and is such a pretty blue color! It is very slim, flexible, and semi-transparent which I love. And I love the size of it, although it is kind of skinny. The thinness is what I like about it but for those of you hoping to use this for school and take a lot of notes you may want to get a bigger binder. It holds 100 of the Kokuyo Campus sheets comfortably (~60 on the rings and 40 in the little slots), but more than that and it starts getting bulky. Pros: pretty color (the lighter parts of the binder are kind of a Robin's Egg Blue, and the darker parts are kind of a deep sky blue), looks and functions as described here, flexible, seems durable, slim, and of course: easy to open and close--the best part! Cons: arrived with marks that made it look like it'd been opened before (packaging had also been taped up rather than sealed like how factories do it), and possibly too thin for some peoples' desired uses (i.e. if you're a student taking a lot of notes a day, this probably isn't the binder for you). It's about an inch wide so if that fits your needs then discard this point. Overall, I'd buy this binder again but maybe from a store (if you could find a physical store that sells it), not from Amazon.

Product works as advertised! I needed a 30 ring binder for my A4 sheets. Love the transparent look and the binder rings while plastic , feel sturdy.

Is light weight, and to my surprise holds paper pretty well, something I really like too is the fact that the folder comes with sides where I can store extra paper, which other kokuyo folder don’t come with, definitely recommend A LOT! 💟✨

Although it's advertised as a Japanese product, they're actually made in Thailand (see the back label). So if you're looking for Japanese level of quality for stationery, this ain't it. I bought two binders, one has dents in the front and back cover that won't go away. The other has rings that are just slightly loose, so if I turn a page it will snag on the gap between the rings, and requires some trouble to turn. That being said, they do work as binders, although not the best quality. I'm forced to buy 4 or 5 more of these for my classes since these are the only 30 ring A4 binders I can find on Amazon. If the new ones are not defective, I'll raise my rating to 5 stars.

First off, I used the packages of 50pgs of the kokuyo campus paper for reference. I can fit 65 pages in the binder without the paper snagging on the rings, 50 pages in the front pocket, 50 pages in the back pocket, plus a 3" x 3" (7.5cm x 7.5cm) pad of sticky notes in the little slot in the back pocket. Love it! Has been sturdy enough to hold up to my daily life, and I have three kiddos ages 6 and under who have gotten a hold of this. No cracks or broken rings lol