Why is sushi ginger is pink?

Sushi is all about the experience: its taste and its presentation. So why not make the ginger that accompanies each piece pink? Unfortunately,when traditionally prepared, sushi ginger typically has a pale yellow to slightly pink hue from the pickling process, but only very young ginger will develop that slight pink tint. Young ginger is generally preferred for the making of ginger because of its tender flesh and natural sweetness. So why the almost neon pink color Americans are so accustomed to seeing? In the best case, it’s the result of very young ginger.In the less than best case, it’s the result of commercial production that has utilized artificial coloring either to intensify the color or because the ginger used was simply too mature to naturally turn pink upon pickling.