Moved residences and found an open bag of loose sencha from YamaMotoYama (BBD "23/04/2022", so old). I held onto it, and tried having tea outside for once. I couldn't take great pictures, and it wasn't amazing to be blunt, but I'll share them and some notes below:
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3.5g/85C(185F)/10s

Dry leaf smells fairly sweet; more grassy than other vegetals, but it isn't quite clear. Wet leaf brings out a bit of light saltiness and savoriness to that aroma, but still grassy without becoming seaweed-like. Bit more savoriness over more infusions, but not too complex.

Low-medium thickness and bitterness, medium astringency. Flavor is more or less still on that sweet grassy note. I'd say it leans more towards "shaded grass" than anything dewy or fresh-cut. Otherwise a bit dull, maybe due to its age, but still drinkable. The retronasal aroma is where I'm enjoying it most, having a nice light savoriness that lingers pleasantly on the back of my tongue for a bit. Endurance is average. Overall okay; probably better when fresh, but nothing I'd actively seek out regardless.
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I didn't put it in my notes, but it did remind me of those cheap green tea hard candies at first. I just don't know how to describe that, and it was only briefly.