From the brilliant toyko mango blog:
"The Japanese love weird canned drinks and octopus balls, so it's only natural that there would be an octopus ball soda. I'd just never seen one before now."
Ok, at this point I should probably note that the balls in question are not in any way, shape, or form, testicular. Ok, maybe "shape." But would you have really read this post if I had announced octopus dumpling soda? Ok, maybe you would have.