I 'm not aware about this until one of my JP friends told me about it. Because it's unusual, super rare that getting tells or friend request from RMT in Masamune.
I haven't seen an RMT shout like in a year?

However, I not worry though. They will be gone and won't stay there for very long. Because I seriously doubt they can make money from the players in Masamune, at least not that much compare to NA/EU server. XD

Few days ago, I went to NA/EU servers pay my friends a visit. The RMT situation at there are far more worst, horrible. You should go see for yourself.
Honestly, I don't know how those NA/EU players able to endure it.