Choosing fountain pen paper and notebooks usually means balancing a smooth writing surface against page format, paper feel, and price. The Tomoe River Notebook focuses on the first two: thin Japanese paper, a velvety texture, and a 5mm squared grid for structured writing. That makes it appealing for fountain pen users who want a notebook designed around the writing experience, but less suitable for anyone who prefers blank pages or a more substantial sheet.
Quick verdict
At USD 39.99, the Tomoe River Notebook makes the most sense for a writer who specifically wants original Japanese Tomoe River FP paper in a thread-bound notebook. Its 5.85 x 8.27-inch format is practical for journaling, notes, and organized writing, while the 160-page count gives it a defined, notebook-style scope.
The central trade-off is equally clear: the 5mm squared grid controls the page layout, and the notably thin paper may not appeal to writers who prefer a heavier-feeling page. This is a focused fountain pen notebook rather than a flexible all-purpose journal.
Tomoe River Notebook 5.85x8.27" 160 pages (80-Sheet) 5mm-Squared Grid White

The strongest reason to choose this notebook is its paper. The Japanese Tomoe River FP sheets are described as incredibly thin, velvety smooth, and well suited to fountain pens and ink pens. For writers who care about how a nib moves across the page, that texture is the defining feature.
The construction also stays straightforward: a classic black soft cover, thread binding, white paper, and a 5mm squared grid. The grid is a useful fit for lists, diagrams, measured lettering, and writing that benefits from consistent spacing. Its stated original Tomoe River paper identity may also matter to shoppers specifically looking for that paper rather than the newer Sanzen version.
Who it suits
This notebook is a good match for fountain pen users who want a smooth writing surface and prefer their pages organized into small squares. It also fits writers who appreciate a thinner notebook format and want 160 pages for a dedicated journal or notes project.
The format is less convincing for freeform journaling, sketching, or long entries where a blank or lightly ruled page would be more natural. The squared layout is not a minor styling detail; it shapes how each page is used.
What stands out from the listed details
The combination of Tomoe River FP paper and a 5mm grid gives this notebook a clear purpose. Many paper choices are about selecting a ruling style, but here the paper itself is part of the appeal. The soft black cover and thread-bound construction reinforce its traditional notebook design without adding unnecessary features.
Meaningful trade-offs
The price is significant for a single 160-page notebook, so the paper experience needs to be the priority. The thin sheet is an advantage for keeping the notebook light and distinctive, but it is also the main limitation for anyone who likes thicker paper under the hand. The fixed grid creates a similar divide: excellent for structured pages, restrictive for open-ended writing.
Bottom line
Choose the Tomoe River Notebook if smooth, thin fountain pen paper and a precise 5mm grid are exactly what you want. Pass on it if your priority is a blank layout, a heavier page feel, or a lower-priced everyday notebook.