Mysty Mountains
 

On the samurai island, there need to be a big mountain that is very cold and very foggy. And it is hard to see, so if you accidently walk of the bridge you will fall down, and is also hoem to many dangerous beasts. This is where there could be a monestary where priests and warrior monks can live and peopel who have commited crimes or are refugees can declare sancuary at. And where cool and tough warriors like ronin raider or ninja could hide from the law.

Yeah, Samurai need to have a nice mountainous island. No trees, just bamboo...maybe even replacing the Seed type trees.

pirate island is the coolest looking, next is samurai

Would that not be a matter of opinion sir?