Merchant Marine

"Shipments come faster."

- In-game description

Merchant Marine is a technology in Age of Empires III: The Asian Dynasties that can be researched at the Consulate by the Japanese if they choose the Spanish as their ally once the Colonial Age is reached. Once researched, it reduces the time it takes for Home City shipments to arrive by 50%.

Strategy
Merchant Marine synergizes well with the Good Faith Agreements Home City Card, which allows Consulate technologies to be researched instantaneously(!) on top of having a 40% discount.