Monster Arena Towns?

[PhamTrinli]

I've been to like 30 different locations so far and have only found 2 towns with monster arenas in them...

Where are the others?

To clarify, I've completed through rank 4

[GespenstKAF]

There's

1.) Romaria
2.) Ibis
3.) Manoza
4.) Cantlin

There's a way to unlock the final arena in Jipang in the post game