Chinese Lantern Plant
About the Chinese Lantern Plant
Scientific Name: Physalis alkekengi
Koupen-chan is holding the fruit of the plant, including the red husk that gives it the lantern-like appearance.
Cultural significance to Japan
Copied from Wikipedia
”In Japan, its bright and lantern-like fruiting calyces form a traditional part of the Bon Festival as offerings intended to help guide the souls of the dead. A market devoted to it - hōzuki-ichi - is held every year on the 9th and 10th of July near the ancient Buddhist temple of Sensō-ji in Asakusa.”