Koutetsukan

Ships
The Iron Turtle City is a humble city, but it is also the single largest producer of boats and ships in the Empire, building mostly for the Mantis, Phoenix, Crane, Crab and Seppun family.

Saying
In Rokugan it is said that with a ship build in Koutetsukan and a Mantis navigator there is no port a captain cannot reach.

Major Resources

 * Legend of the Five Rings Roleplaying Game, Third Edition Page 300.