After Keiji mentions that he is heading to the cellars, the Daimyo immediately moves forward and he tells Keiji, "Let me accompany you, Sellsword. After all, the cellars are on my estate, and I would feel better showing you where it is than to simply let you wander around," 

He clearly doesn't take 'No' for an answer, and leads Keiji to the cellars. He leads Keiji through the Zen Garden until they reach a large door in the ground. He opens the door and leads Keiji down into the dark cellars. The cellars are large, but seem to empty except for numerous empty bottles that used to hold sake lying on the ground. That's just what he can see up close. The cellars are dark and there doesn't seem to be a light, except for the torch that the Daimyo lit and holds aloft to illuminate the room.