|Book(s)||Konjaku Hyakki Shūi|
Jinmenju (人面樹, Jinmenju) is a strange tree with human faced fruits called jinmenshi, human-faced child. The tree is said to be found in remote valleys from the south of Japan and China.
This tree is found in mountain valleys. The fruit of the tree looks like a human head. It doesn’t say a word, but it is constantly laughing. It is said that if the fruit laughs too heartily, it falls from the tree.
According to the Edo period Hyakka Jiten encyclopedia Wakan Sansai Zue (和漢三才図会; A Collection of Pictures of Heaven, Earth, and Man from China and Japan), the Jinmenju trees are found in the south, and the fruit of the tree is called the jinmenshi, or human-faced child. They ripen in the fall, and if you eat the fruit they have a sweet/sour taste. It is said that the Jinmenju seed also has a human face, eyes, ears, nose, and mouth.
In the past however, it was said that people planted great orchards of the laughing Jinmenju.
The legend of the Jinmenju comes from China, and was passed onto Japan where it was considered to be a yokai due to its peculiar nature. There are also stories of trees bearing human-faced fruit from India and Persia, usually with the faces of beautiful girls. Even now, when you walk through the forest you can see trees whose roots bear a resemblance to human and yokai faces.
Toriyama Sekien included the Jinmenju in his collection Konjyaku Hyakki Shui (今昔百鬼拾遺; Supplement to The Hundred Demons from the Present and the Past). All Jinmenju stories have their origin in a Chinese book Sansai Zue (三才図会; A Collection of Pictures of Heaven, Earth, and Man).