I wanted to share a great experience I had.
First a little background. I work at a very excellent tea store where I have access to very high quality tea. I have been drinking tea everyday for three to four years now.
To get to my point, the store I work at stresses Chinese and Taiwanese teas more than Japanese, although we do carry some high grade Japanese Senchas and a high quality Gyokuro. Because of this I don't drink the Japanese teas that frequently. At one point I was in a Sencha phase and occasionally I drink the Gyokuro.
Usually when I drink the Gyokuro I brew it at around 140ºF maybe for 30 sec and I will make around three steepings. But, I talked to an owner of a different tea store in my area and asked about brewing Gyokuro. He recommended using about 3-4 grams of leaf, room temperature water, using just enough water to cover the leaves, and steeping it for about 10 min. I tried it out the next time I went into work.
It blew me away.
It literally made about a half tasting cup of tea, but it was the best cup of Gyokuro I have ever had, ever! I made a couple more steepings using the same method. They were also delicious and better than previous cups of Gyokuro I had made in the past, but the first steeping was amazing.