So I had already steeped this twice, and I wanted to try an experiment. (otherwise, I probably would have simply discarded the leaves). For the 3rd time, I wanted to bring out less astringency and more sweetness, so I steeped it at 140, for a while (I’m guessing between 1-2minutes).
Actually, it DID taste sweet. Well, it was very watered down and not particularly strong, but the sweet fukamushi taste was definitely there, and it was good.
Glad I experimented!