The only directions on the tin stated
That sounded like way too high of a temperature to me and it mentioned nothing about the tea/water ratio.
I went to o-cha.com and used their directions as best I could with the equipment I had. I used 8 grams of gyokuro for 8 fluid ounces ( 1 cup ) of water. I brewed at 140F for 1 minute. The results were awful. Bitter, like I boiled lawn clippings. I went down to 120F using the same leaves on subsequent re-brews. The results were a yellow instead of a green tea, that was mostly tasteless. I would have been better off with a green tea bag from a restaurant.
Today, I started over again, this time using only 4 grams of gyokuro for 8 ounces of water and I brewed at 140F. I still got a bitter yellow tea without much hint of green.
Can this gyokuro be saved or did I just make a bad purchase?