Yesterday, I had a pot of this, and I think I figured out the ideal steeping parameters (for me, at least). My thought was, well, with a fukamushi cha, you have to do it short because of how small the pieces of leaves are, so they brew much more quickly. What if I tried this tea like that?
So I did both the temp and time less than what is suggested on the package:
165 or 170 degrees for 45 seconds
All three steepings were creamy, slightly sweet, and slightly vegetal (with slightly progressive weakness, but not a lot). I was quite disappointed I had to quit after that!