I'm going to to the Makuhari warehouse next month by taking the Keiyo line. Am I allowed to bring a suitcase with me inside the store, so that I have a mean to carry the stuff back to my hotel? I see some warehouses ask you to store the suitcase in the coin locker, but I'm not sure if there is one at the Makuhari warehouse. Or maybe I will be asked to store it at the membership service desk?

Any insights welcome. Thanks!