This is from a sample I bought from Yunomi. I followed their brewing instructions on the package.
1st brew – 60C at 60 sec. This was so sweet and grassy. A good umami taste to it with no astringency.
2nd brew – 80C at 15 sec – I messed this tea up a little bit. The tea leaves had swelled up in the tea pot and I had trouble pouring it quickly so it went way past the 15 sec. It was still sweet and grassy but had a good astringent bite on the tip of the tongue. That probably would not have been there if I could have poured the tea quickly
3rd brew – I changed up the teapot for a quick pouring gaiwan. I steeping it about 20 or 30 sec. Can’t remember now. The umami flavour of it was fading a bit in this one but it didn’t have that astringent bite the 2nd infusion had. Was still sweet and grassy but a little less.
I found this sencha to be a pretty good quality and would buy more of this.