“Mum’s” the word. This is the treat that dutiful Japanese moms put in their kids’ backpacks for good luck during test taking (of course, nothing beats an Amulet from the Meiji Shrine….designed for that purpose, of course).
That is, of course, unless mom’s a Geijin. Then you get a bucket of ribs and some, what appears to be, bratwurst. Hope she threw in a cold one, too.