I couldn't find a list of what sources (like which journals) they're archiving from. Does anyone know where to find that? It would be nice to see what subject categories the archive covers.
Some fields/disciplines are probably still systemically under-represented. For example, I bet we are missing a bunch of scholarship on art and history published before 1980. We have a couple ideas up our sleeves which we hope will help with "completeness" across more disciplines.
To answer your question directly, you can search journal names here: https://fatcat.wiki/container/search
And click through to see how many articles we know about, and what we think the preservation status is. Click through again to the "coverage" tab for a more detailed breakdown. (improving the usability and ranking on the journal search results is on our short list)
Two large sources in Japan you might consider trying to mirror are the UTokyo Repository [1] and Researchmap [2], through which many researchers in Japan release PDFs of their own papers. Other Japanese universities probably have archives similar to [1].
If you would like me to contact somebody at [1] who might be able to work with you, please let me know in a reply to this comment. (I helped to arrange the IA’s recent tie-up with the University of Tokyo General Library.)
For Japanese publishing, we have done metadata imports from JaLC (Japanese DOI registrar), and crawled a lot of open content from J-Stage (https://www.jstage.jst.go.jp/) and I hoped that coverage was pretty good. If you get a chance, could you try searching for metadata records on https://fatcat.wiki, with both Japanese and English titles and names (if applicable)?
For Korean publishing, the regional DOI registrar (https://www.kisti.re.kr/eng/) does not provide open metadata, which is a known hole in our coverage. IIRC it looked like there might be a way to scrape at least DOIs, titles, and author names, but haven't had time to take a crack at it.
Mainland Chinese publishing is probably the biggest single hole in coverage by absolute numbers. There are two DOI registrars and neither have open metadata.
Regarding the u-tokyo.ac.jp, it looks like we are able to consume metadata and do crawls via the OAI-PMH protocol. We crawled over 112k URLs from that domain via that protocol about a year ago, and they should be preserved/mirrored in web.archive.org but they haven't ended up in fatcat or scholar yet. We want to go slow with pulling in OAI-PMH content, and ensure we de-duplicate records and add filters to ensure we are getting clean metadata and content. Also preserving repository content hasn't been as urgent as getting to small OA publishers which might lack a preservation scheme and vanish off the web.
My subsequent vanity searches at J-Stage and Fatcat weren’t very encouraging. Most of my own papers have appeared in journals published by Japanese university departments or academic societies. While PDFs of the papers appear on the websites of the issuing organizations and show up on Google Scholar, they don’t seem to have DOIs or be listed on J-Stage.
I should mention that my research has mostly been on the humanities side of things, while J-Stage is “an electronic journal platform for science and technology information in Japan” [1].
[1] https://www.jstage.jst.go.jp/static/pages/JstageOverview/-ch...
For future follow-up, my work email is my handle here (bnewbold) at archive.org