The botanical to be added this time is Yashikibara watermelon produced in Minamiuonuma City, Niigata Prefecture.
Because it is located in a mountainous area surrounded by black earth volcanic ash at the foot of Mt. Hakkaisan and the three Echigo mountains (Mt. Hakkaisan, Mt. Echigo Komagatake, and Mt. Nakanodake), there is a large temperature difference between day and night.
The rind of the Yashikibara watermelon is used as a key botanical.