I've looked at your T80 save and a few things come to mind -
I smashed my copper mine and re-built it, worker turns were not a bottleneck here
Spoiler :
- We didn't settle the silk+sheep city in the same spot. I like the extra commerce from the silk and having these first ring forests (chop granary, 1whip lib), but having the sheep first ring is nice too. Could argue both ways. Same thing with cottaging the silk: I don't like that as we've got other riverside tiles to cottage, later on it's a big loss in commerce. But the early commerce is useful, too. Saving half a turn towards Optics can be good. Not sure.
- I don't think you gain anything by grabbing the fish with Tokyo. It makes you tech Mysticism+build a monument + miss out on some river tiles. You can't grow big anyway before Astro.. too many losses imo
- Why did you settle Kagoshima? It's a useless city until you start building units. It's arguable that a 5th city can be beneficial (probably the western clam+FP), but I don't see a reason to settle this city, especially when building another Settler in Osaka..
- Looks like you'll have a better set-up empire than me when reaching Optics, but you'll reach it later, unless you hold some kind of dark secret
- Oh and as always you built less workers than I did, but land improvement isn't bad
I smashed my copper mine and re-built it, worker turns were not a bottleneck here
