This drink may (or may not) be a faithful representation of a cocktail we had while out to dinner at a small ramen restaurant in Oakland, California one evening. We loved it, but failed to flag down the bartender to ask for the recipe, and so have spent several years since trying to reverse-engineer it.
At this point, it's unclear how closely this recipe resembles the original, but at this point, we don't really care - it's delicious, and that's enough for us.