Green Tea Ice (Powder to Make Green Tea Ice Cream)

I was lurking around yet another Japanese Supermarket in hopes of finding more stuff Matcha when I came across this delightful little treasure:

Unfortunately though... the instructions are in Japanese although the pictures seem self explanatory. Add 1 satchet of the powder to 150mls of milk, mix well and freeze?

I wanted to be sure this was all there is to it and hence asked Obachan, who has kindly agreed, to help me translate the instructions. If this turns out to be the receipe for rat poison... I will update. hehe