But seriously, I’m a little skeptical about whether Yoshinari’s take on _Yusenkutsu_ reflected any real currency among the literati of his time, or that of the Genji author’s, rather than his vast personal erudition, somewhat goofy sense of humor, and evidently crushing OCD — I suspect that many of his Sinitic glosses (not unlike the funny phony signature attached to his preface) may be tongue-in-cheek, or at least a stretch, say. _Yusenkutsu_, BTW, is not, in my experience at least, an easy read, and I suspect the amount of attention it received may have had no less to do with the titillation than to an awareness (which sank in when? however — vague impression maybe not until late 19th c.?) of the extinction of mss. in the motherland, so to speak.
Many thanks, meanwhile, to Erin for a fascinating read (still digesting).