Multiple x-post... unfortunately I'd made the decision (to continue with Lit) before I saw the above posts. I think Akichi will be un-corrupt enough (19%?) to benefit from a Library. It has plenty of commerce potential so it may not be a total waste. Even 1 Library, there, would help. It's Temple still isn't done so there's time to switch it to a Granary as a Lib pre-build if we want.
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T0 330BC Akichi Sci->BG, Ao Sci->BG, Wealth->Harbor, Sushi Palace->Granary - wasting 116 shields

Moved the boat to 1NE of Akichi and unloaded the Warrior into Akichi. Lit now in 25.
T1 310BC Sensei Harbor->Worker, Sushi Granary->Harbor. Sensei grows to size 3. Re-assign Sensei & Sushi Citizens for more cash, timing Worker with growth and getting Harbor still in 5 (after a swap back after 2 turns). Move boat (now named Gojira) back towards Sensei. Move warrior (Akira) down south. Lit now in 21 @ -2gpt (6 in treasury).
T2 290BC Another slight tile re-adjust in Sensei for a bit more cash. Lit now in 19 @ -2gpt (4 in treasury).
T3 270BC Decide to keep Sushi on its higher-cash setting and get a slightly slower Harbor. Swapping Sensei back to the cow for growth this turn means Lit still in 19 @ -2gpt (2 in treasury).
T4 250BC Sensei Worker->Settler. Worker loaded onto Gojira, sail it down towards the island. Sensei settler factory (6 turn cycle): 1: BG+Cow+Rocks (3f6s) 2: Fish+Cow+Rocks (7f10s) 3: Fish+Coast+Rocks(+Cow) (0f14s) 4: Fish+Coast+Cow+Rocks (4f18s) 5: Fish+Plains+Cow+Rocks (3f24s) 6: Fish+BG+Coast+Rocks(+Cow) (0f30s) Sci down to 80%. Lit in 22 @ +1gpt (0 in treasury).
T5 230BC Worker unloaded onto BG. Sci @ 90%. Lit in 18 @ -1gpt (1 in treasury).
T6 210BC Worker roads. Sci @ 80%. Lit in 19 @ +2gpt (0 in treasury).
T7 190BC Sushi Harbor->Galley. Lux @ 10%. Lit in 17 @ -1gpt (2 in treasury).
T8 170BC Sushi grows to size 4. Swaps Clams and BG with Nibanme. Lit in 15 @ -1gpt (1 in treasury).
T9 150BC Sci @ 70%. Lit in 15 @ +2gpt (0 in treasury). Leave it there - it's getting late, this rectifies the turn numbers.
Somehow I expected to get more done.
Sensei will finish its settler next turn. Sushi is on slow growth for its galley, at size 5 we would need 20% Lux. I think we may want to stifle its growth to produce a settler unless we think 20% Lux is okay for a bit. It should run at 2-4 in 8 turns for a settler.
Both Akichi and Ao will grow next turn. Akichi will get an MP, Ao a Sci, unless it's not too corrupt to benefit from the 10% Lux.