"JA" is a comedy manga with the theme of agriculture, which is serialized in "Young Ace" (published by Kadokawa Shoten). Since the stage of the work is Nagano prefecture, it seems that this collaboration was realized.
The package uses illustrations drawn by the author, Narumi. An illustration sticker with the same design is also included, and you can enjoy it as an "original can" by sticking it on a can.
Products can be purchased at Yawata, Isogoro Daimoncho store and online shops.