Per comments on yesterday's post: I think I found it. A5, linen-bound hardcover, sewn lay-flat binding, 256 (!!!) pages, dot grid, ribbon bookmarks, page numbers (not in my absolute preferred location but in what is definitely second-best). Thread is light blue i.e. extremely relevant to my #aesthetic. Paper is Cosmo Air Light: possibly slightly off-white, definitely fountain pen-friendly, haven't actually used it before and don't know what I think of it but definitely Worth A Try.

Additionally and furthermore I found a UK stockist and more-or-less immediately placed an order, so it might even arrive with tomorrow's post. I then need to hold off on buying a multi-year supply of the things until at least the end of January, which should give me a decent chance to work out if it is actually The Notebook Of My Dreams Made Manifest, but -- cautious delight!

So of course it was only then that I remembered that I'd read multiple positive reviews of the things (UK Fountain Pens and Mountain of Ink) -- though admittedly those were for variants with prints I'm not fond of used on the cover, and with a lower page-count.

I am also, obviously, wisting slightly over the limited edition A5 Cahier Momiji; it's not something I' actually use but I'm enjoying looking at the pictures of it.

Doubtless I will report back In Great Detail at... some point.