Tekkousen

The Tekkousen (pronounced Tek-oo-sen) is a strong japanese naval unit that can be trained at the dock. It has similar hitpoints and strength to a frigate, so it can destroy weaker units such as the Galleon, Atakabune, Canoe, Marathan Catamaran, or the fishing boat. The best type of unit to counter the Tekkousen is artillery, or the monitor if you are attacking at sea.