Your moon storehouse is another storehouse you own. Remember how your regular storehouse holds zombies (from the kanji 蔵?). Your moon storehouse is on the moon, and it is filled with internal organs.
Where did you get all these internal organs from? You actually harvested them from the zombies (ぞう) from your other storehouse.
Currently there are no similar looking kanji which exist in the WaniKani learning system