Momotarō's Peach Pit

Origin
Momotarō the Peach Boy is a classic Japanese fairy tale. The story goes that a couple found a baby boy inside of a giant peach that they found. They raised the boy, and when he was a small child he went on a quest to defeat some evil ogres with the help of a talking dog, pheasant, and monkey.

Like many fairy tales, the story contains some socio-political insights of the time. The ogres were said to have come from a faraway land, were tall, and had blonde hair with blue eyes. The ogres were meant to represent western Europeans while Momotarō represented traditional Japanese values. Momotarō driving off the ogres was the representation of the desire to fend off the spread of western culture into Japan, which many thought was causing native Japanese to lose their heritage in favor of winning the support of rich outsiders.

Effects
The pit needs to be planted in the soil. It will then rapidly grow into a fruit-bearing peach tree. The peaches may be safely consumed by most, but when eaten by a person of Japanese nationality or descent it will cause them to hallucinate.

They will see all non-Japanese as Oni, ogres, and will attack them without cause.

Collection
The agents collected the pit while investigating the attack of a British merchant in Japan. The suspect attack the merchant, screaming "Oni! Oni!". While this was a little odd in itself, the man who attacked the merchant was a trading partner in the middle of a deal that would make him very wealthy. After collecting the pit the tree and the remaining fruit were destroyed as they were not artifacts themselves.