14 Ghost on the Moon According to Japanese legend, if you knew how to seek the ghost who tends trees on the moon, he could invite you to the moon to eat the leaves of his tree, making you invisible.
In normal times, before the need arises, you should find someone as an undercover agent who will become the betrayer, an enemy you plant and thus make a ninja of him and have him within the enemy castle, camp or vassalage, exactly as the ghost in the legend, Katsuraotoko, is stationed on the moon.
—Bansenshūkai, Yo-nin I 1
As part of its array of sophisticated infiltration techniques, the Bansenshūkai describes a long-term open-disguise tactic called “ghost on the moon.” This tactic was designed to acquire privileged information and access through ...
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