Choosing fountain pen paper & notebooks usually means balancing ink performance, portability, and format. The A5 Notebook with 68gsm Tomoe River Paper is aimed at writers who want lightweight pages for fountain pens, but its refill design matters just as much as the paper itself.
Quick verdict
At USD 16.56, the A5 Notebook is a focused choice for everyday notes, planning, sketches, and handwritten ideas. Its strongest appeal is the combination of smooth Tomoe River paper and a fountain-pen-friendly design. The central trade-off is that it is presented as a refill for the Field Journal and Field Folio A5, so it is best suited to shoppers already using that kind of setup.
Product note
A5 Notebook (5.8" × 8.3") | 68gsm Tomoe River Paper, Fountain Pen Friendly

The clearest reason to choose this notebook is its 68gsm Tomoe River paper, which is described as smooth, lightweight, and resistant to bleed-through and feathering. Thread binding and white pages give it a straightforward writing format, while the A5 dimensions leave room for notes without making the notebook especially bulky.
The limitation is its stated role as a refill designed for the Field Journal and Field Folio A5. That makes the notebook a more natural fit for an existing A5 cover system than for someone specifically seeking a conventional standalone journal.
Who it suits
This notebook fits fountain-pen users who want one paper format that can handle notes, plans, sketches, and creative writing. It also makes sense for travelers and everyday-carry users because the description emphasizes portability and a lightweight build.
The choice of page layout is another practical advantage. The notebook is available in Dot Grid, Ruled, Plain, Grid, and Planner layouts, allowing the format to match different writing habits. Dot grid or ruled pages may suit general notes, while a planner layout is aimed at more structured scheduling.
What stands out
Tomoe River paper is the defining feature here. The notebook combines that paper with an explicit fountain-pen-friendly purpose, rather than leaving ink use as an open question. Its pages are also acid-free, which suits people who want to keep notes, sketches, or plans over time.
The paper's lightweight character is useful when carrying a notebook throughout the day. The listed package dimensions of about 8.31 by 5.79 by 0.28 inches reinforce its compact A5-oriented format without turning the review into a promise about how every pen or ink will behave.
Meaningful trade-offs
The refill designation is the main point to weigh before buying. If you already use the Field Journal or Field Folio A5, the intended role is clear. If you want a notebook with its own permanent cover, the product description does not position it that way.
Layout selection also affects the experience. A planner user and a sketcher may want very different page styles, so choosing among the listed formats is important. The USD 16.56 price is reasonable to consider alongside that intended refill role rather than judging the notebook only by its paper.
Bottom line
Choose the A5 Notebook if smooth 68gsm Tomoe River paper, fountain-pen-friendly writing, and a choice of page layouts are your priorities. Pass on it when the refill format does not suit your setup. For the right A5 system, it offers a compact way to carry fountain pen paper for notes, plans, and sketches.