daijr
日本では平安時代以降，陰陽師によって広まり，経などを読誦し，共食・歓談しながら夜を明かした。
not sure "festival" is actually the best word for it

I know I initially suggested this should be shortened but I think it works better like this. it's an interesting phenomenon that 
deserves to be described in a comprehensible manner

@@ -15 +14,0 @@
-<xref type="see" seq="2428120">青面金剛・しょうめんこんごう</xref>
@@ -20 +19 @@
-<gloss g_type="expl">festival where participants stayed awake on the eve of the 57th day of the sexagenary cycle to prevent the three worms from reporting one's wrongdoings to the gods</gloss>
+<gloss g_type="expl">staying awake on the eve of the 57th day of the sexagenary cycle to prevent the three worms that were said to inhabit the human gut from reporting one's wrongdoings to the gods; a tradition that began among nobility in the Heian period and became widespread during the Edo period</gloss>

is this ok?

@@ -19,2 +19,2 @@
-<gloss>festival associated with Shōmen Kongō</gloss>
-<gloss g_type="expl">staying awake on the eve of the 57th day of the sexagenary cycle to prevent the three worms from reporting one's wrongdoings to the gods</gloss>
+<gloss>kōshin-machi</gloss>
+<gloss g_type="expl">festival where participants stayed awake on the eve of the 57th day of the sexagenary cycle to prevent the three worms from reporting one's wrongdoings to the gods</gloss>

I feel this and the equivalent glossing in 三尸 are getting a bit too encyclopedic. I guess it doesn't matter that much.

I added back some of the stuff that was lost in the last edit, but shortened it a little.

@@ -19,0 +20 @@
+<gloss g_type="expl">staying awake on the eve of the 57th day of the sexagenary cycle to prevent the three worms from reporting one's wrongdoings to the gods</gloss>