I live in Toronto/Canada. I've been playing Kendo for ten years now and basically hold the bottom of the class in my club.
Kendo in Toronto is excellent compared to anything outside Japan or Korea. There are two eight Dan Sensei that come to our club and numerous seventh dan Sensei. If you don't understand what that means, you don't understand good quality kendo.
Kendo in japan varies from crappy public Dojos to Dojos that YOU WOULD NEVER BE ALLOWED TO PRACTICE IN.
For foreginers wanting to practice Kendo in Japan you will likely either be totally ignored or nearly killed for daring to visit some clubs. Even if you have an endorsement from your sensei. Frankly, unless you are playing at a national level you should forget it.
There are some groups that arrange kendo visits comprised of foregniers for the sole purpose of kendo. This is a little more accepted. Kinda like a tour bus of crappy white guys (lol!) Ask your Sensei or a Sensei in your community about it.