Can also be bought in Hawaii though it will require substantial development before it will appear in the market (57k)...
Collected (R8) some of these in Amazon Upstream landing site.
Result of the experiment of this trade good for nanban:
Taiwan ★★
Japan ★★
Korea ★★★
South China ★★★
[Star rating description, 1 star is worst, 5 star is best]
★ = 1:1 Nearly impossible even max trading skill + all available nanban buffs.
★★ = 1:1 Very hard, though possible with railroad-, EX and NTP combined.
★★★ = 1:1 May be hard, though do-able with either high trading skill or one of the nanban buffs
★★★★ = 1:1 Easy, though trading skill rank may be needed.
★★★★★ = Its loved! May not need trading skills to get 1:1 exchange.
Note: This could deviate depending on the backstock/state of the ports! This assume players are using
Nanban Purveyor Certificate.