[Sangetsu]

Kendo is nothing like Muay Thai, but it's not difficult to "jump into", especially if you are taking classes in Japan.

Where I studied Kendo, they wouldn't accept anyone with less than a brown belt in karate, so it was pretty much off-limits to new students. Most schools are not like this, and more than likely they are more than willing to accept students with no experience in the Japanese martial arts.