As promised, I dropped some gyokuro into a fresh cup of shincha.
Thus, the Uji Sunshade was born. And quickly exterminated.
It was not that great.
But you knew that, didn't you?
I would recommend doing this if you wanted to improve the taste of a poor sencha with a shot of decent gyokuro and have the gyo to spare. It does bring back to life the later steepings of a nearly worn-out sencha session. The negative is that the gyokuro is totally lost, obviously.
Another observation is that the gyo seems much heavier than the sencha. The gyo flavor gradually disappears, only to come back in full force toward the very bottom of the cup.
These two pleasures are best enjoyed out of separate cups if you have them at the same time. Just, you know, for the record.