Mildly concerning yes, but there's actually nothing in the post that alarms me. The Sheldon Cooper in me certainly is thinking "Change is never good", but it's actually a pretty informative blog entry and the changes it describes are not, to my mind, particularly bad.
I like TR paper because how it accepts ink and how it feels when I write on it. To me it's biggest downside is how thin and crinkly it is. So if it's getting thicker my initial reaction is going to be "Thank you!". I'm assuming of course that they're going to mess up the texture or the ink handling.
I prefer 68gsm to 52, not just because of the extra thickness and reduced showthrough, but also because of the different texture of the paper. Interesting to read, though, that the 68gsm I have been using is intended for a different purpose than the 52gsm. Perhaps the new 68gsm paper intended for writing will have a finish that more closely matches the 52? And to be clear, the surface differences are minor: the experience between 52 and 68 is smaller than the difference between, say, TR and Midori.
I've read elsewhere that Tomoegawa is so large that nobody producing notebooks buys directly from the manufacturer: they buy from distributors who buy from the manufacturer. I have also read that the current 68gsm paper is already special order. So what the blog post says about the state of purchasing the new 68gsm doesn't sound very different from the current state. I don't know what the current minimum order from Tomoegawa is, but 20 tons of paper isn't all that much (have you ever toured a modern paper machine?)
The only place here that I might be concerned, every notebook maker will address changes to thickness as they see fit: if they think page count is important then the notebook gets thicker (and maybe your old slip-covers no longer fit). But if they think the experience of the heft of the notebook is more important then the pagecount could go down to maintain the same thickness. Personally, I prefer a lot of pages, but up to a point: for a 192page notebook I would prefer that it get thicker, but for a 480 page like Nanami then maybe reducing page count a bit in order to keep the same dimensions would be ok.
At least when we chase notebooks that use TR paper, we know what the paper is even if it's subject to occasional manufacturer tweaks. On the other hand, when you buy a notebook that is just for the notebook brand, then you don't even know what the paper is and it's subject to the notebook companies' purchaser's whims as well. A more extreme example there is Moleskine, but there are recent threads here about changes in Leuchtturm paper and the once-revered HP copy paper.
Edited by XYZZY, 09 July 2020 - 17:19.