I bought it at Koyama Shoten!
It was not as sweet as I expected.
It was a little peculiar right after opening the package, but after a few days it became easier to drink.
I forgot the price.
I bought it at Asahiya. I bought it because it seemed to be a member of the Hanamup family. It was not as sweet as I expected. It was refreshing and easy to drink.
Tasted it at the Tokyo University of Agriculture Store and bought it because of its delicious taste. Repeat several times. A little peculiar sweetness.