Thank you for the screenshot. On a related discussion on GitHub[0], Jim proposed a baseline for archaic entries to at least appear outside of nikkoku, which is why I raised the point here. I'm satisfied with this.

[0]: https://github.com/JMdictProject/JMdictIssues/issues/97#issuecomment-1829212300

https://i.imgur.com/qO0FgiC.png

I see. As every other vocab I submit, it's something I've encountered in whichever videogame I happen to be playing at that time, in this case is "Nioh", it's used in the description of a set of 膝甲(thigh guards) in the game, screenshot above.

* 学研全訳古語辞典: https://kobun.weblio.jp/content/馬鞍
* https://agriknowledge.affrc.go.jp/RN/4020000050

馬鞍　 7,647 <- likely false positives
馬の鞍 7,422

Yes, it only appears in nikkoku and not any modern references.

Marcus A., it would help you to make a case for inclusion of these kinds of terms if you say where you came across them, as many of the editors feel the project should focus its efforts on terms in use.

https://kotobank.jp/word/馬鞍-2011834

this term should be marked as archaic?