I wanted to show you an example of how the taste changes along water temperature. Today I actually brewed tea in different temperatures. I adjusted brewing time on each brewing to get the right density.
** Conditions **
Tea: 2grams (average sencha)
Water: 60ml (2.1oz)
A: 90degC (194F), 40sec
B: 80degC (176F), 60sec
C: 70degC (158F), 90sec
A: Strong bitterness
Rich bitterness filled my mouth. I tasted umami but the presence of bitterness still prevailed. The bitterness continued to stay until the aftertaste. And as the taste of bitterness faded away, the sweetness remained in mouth as a cozy afterglow.
B: Good balance of umami and bitterness
It had a good body of rich umami and bitterness. I liked the nice harmony of the flavors. It had a simple but satisfying aftertaste.
It had a rush of light bitterness, but after that, sweetness filled my mouth. I guess the umami taste also gives off some sweetness. This tea was a little mild for me. I should have brewed a little longer, 120sec perhaps.
Overall, Tea gets bitter with high temperature water and milder with low temperature as I mentioned yesterday. I liked B best among the three. I think 80degC (176F) water and 60sec brewing are good for this tea.