Here's a short description of the J-Binder system. Please note that in product descriptions, instead of using "loose leaf" we use the abbreviation "LL".
Over the next few months, for the J-Binder system, we will be concentrating on the B5 paper size. All LL (loose-leaf) papers and binders in sizes A5 and A4 will be phased out; for the time being we would like to develop the binder system on one common paper size (B5). It the future we may re-introduce the A5 and A4 sizes.
We apologize for any inconvenience.