But I don't want to carry it all day.

The following picture shows the rules for use of coin operated storage lockers at Shinjuku Station. Click for a larger view. All pretty standard until you get to 2.7...

Of so its prohibited to store this corpse I have been lugging round the city with me all day while I go and do some shopping? What am I supposed to do with it then? If I leave it here, someone might steal it and then I'd have to go report it to the police...