"Comical Twelve Signs of the Zodiac" Rat
Perhaps an imitation of the Sanno Festival held at Hie Shrine? They seem obsessed with the festival music rather than the sake, so maybe they had already drunk their fill. Hie Shrine is known to enshrine monkeys as god too.
Artist: Utagawa Kuniyoshi
Published: Ansei 2 (1855)
Publisher: Kiya Sojiro
Tokyo Metropolitan Library