I drink mostly one tea from the most sacred Buddhist temples in Japan. I take the same tea back to Japan as gifts since they can't buy it because it all comes here. I spent many days at multiple tea shops in multiple cities and never found anything as good. Teavana was sole supplier in the states but they went out of business. It is called Sencha Hikki. The highest grade of Japanese green teas is called gyokuro. It is picked and put into wooden boxes to cure to avoid the chlorophyll turning bitter. It is also known as dessert tea. Higher grades 140 degree water, steep for no more than 1 min 20 sec first steep, 20 seconds 2nd and 3rd if it is good and fresh. The real bitterness of green tea comes first from curing, second from water temp, third is steep time.