His gold bonus would apply to both the ship he’s on and the target of the trade, yes?
Yes
Suppose the players managed to pull off three trades with Dutch and Japanese ships, does the ship he’s on get a collective +3, or would it be more like three separate +1’s
Technically either way works as it depends on how treasure bonuses are tracked/collected, which is deliberately left ambiguous in the Code. “This tally may be recorded using any number of mutually agreed-upon methods”
Also I’m noticing, he’s Loyal: Japan, despite being a Dutch crew.
Indeed; by design and based on history. 😀