Let's close this with an arch for now. I tried raising the issue on the mailing list on April 6 but there wasn't much response.

@@ -16,0 +17 @@
+<misc>&arch;</misc>

It's not mentioned in the policy document, but when we 
discussed this on the mailing list in 2012, Jim 
suggested that:
"if the term was really only used in the Edo period or 
earlier,
it should be marked "arch".
- if the term was used up to, say. early Showa, but is 
no longer
current, it should be marked "obs". (ウンシャン from 
"unschön"
is an example - it was a Meiji-to-early-Showa term)"
Maybe this should be discussed again on the mailing 
list.

We have a lot of other entries tagged [arch] that have examples from the Meiji era.
I don't think this word is ever used nowadays except in the form 如才ない. I'd argue that makes it [arch].

The two examples in daijr are from 1692 and 江戸後期, but 
the first daijs example is from 1895 e.g. well into Meiji 
(Meiji 28). 「お前に―は有るまいけれど」

@@ -17 +16,0 @@
-<misc>&arch;</misc>

daij, koj

The existing glosses were for 如才ない, which has the complete opposite meaning.
Appears to be [arch].

@@ -5,0 +6,3 @@
+</k_ele>
+<k_ele>
+<keb>如在</keb>
@@ -12,11 +15,7 @@
-<gloss>affable</gloss>
-<gloss>slick</gloss>
-<gloss>smooth-tongued</gloss>
-</sense>
-<sense>
-<pos>&n;</pos>
-<gloss>smart</gloss>
-<gloss>sharp</gloss>
-<gloss>clever</gloss>
-<gloss>skillful</gloss>
-<gloss>adroit</gloss>
+<pos>&adj-na;</pos>
+<xref type="see" seq="1762340">如才ない</xref>
+<misc>&arch;</misc>
+<gloss>sloppiness</gloss>
+<gloss>carelessness</gloss>
+<gloss>inattention</gloss>
+<gloss>oversight</gloss>