Internal Organs
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.
Your moon storehouse has internal organs because 1) you have to keep them far away from the zombies or they'll go berserk, and 2) you think it's funny to see them bounce around in low gravity. Boing, boing, boing, haha look at that internal organ.
ぞう
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Where did you get all these internal organs from? You actually harvested them from the zombies (ぞう) from your other storehouse.
Basically, you store zombies in your regular storehouse, harvest their organs, then launch them into space where they are put into a storehouse on the moon where the zombies will never be able to find them again.