Full disclosure here that I don't read Japanese, so this is based solely on trying each packet and figuring out flavors that way.What does it taste like
Purple - grape
Pink/white/green - strawberry or possibly watermelon, or some combination of both
Green - Honeydew melon
Orange - Orange
Blue - 99% sure it's that soda with the glass ball inside, which Google says is called Ramune
Orange and blue are prime.