Kotaku:

This is Pepsi J-Cola. According to website NariNari, it is aimed at Japan’s cola-loving “heavy users."

That’s exactly what NariNari wrote: ヘビーユーザー (hebiiyuuzaa), which is, of course, what’s used in the cola industry to refer to people who drink loads of the fizzy beverage.

J-Cola was developed after getting feedback from over a hundred Japanese cola lovers.

I’d imagine the US equivalent would just be a shit-ton of Mountain Dew.