Jūrokucha

Jūrokucha means "16 teas" and is made up of 16 ingredients. It's kind of like Dr. Pepper minus 7 (corn syrup, caffeine, synthetic prune extract, shoe polish, etc.). It's considered a healthy drink, and it's slogan is Iki-iki Japan (iki-iki meaning "lively"). That's why that lady leads all the mascots of Japanese prefectures in 3 seconds of exercise.

The songs lyrics roughly translate to:
Japans future is lively lively.
Drink  Jūrokucha (gulp gulp).

This kind of nationalistic propaganda is very reminiscent of the type seen prior to WWII. I have to say, I'm not a huge fan of that, but I do like how the lady frantically points at the bottle to remind us what we should buy. Overall, I'd give the commercial a B+.