You seem desperate to get it in Japan. Here is the Amazon JP link: http://amzn.asia/8Vm29db I also recall that I found Kool-Aid in a foreign food store. read more
At the time, Kool-Aid was the more popular powder mix juice drink among active kids, more than other brand of juice drinks. The frequency of advertising and other marketing efforts poured into product bombarded families with children, and so their minds were saturated with the image of Kool-Aid as the best juice drink around. read more