[RIjdrVs3]

Id think kendo would be a better sword form and art than most other ones. I mean they even found a one handed midevil sword fighter.

As has been mentioned, kendo has a shorter list of valid targets. When compared to most other martial arts Kendo is also more of a "gentlemen's" art in that it enforces a strict mode of fair play and sportsmanship. Kendo does not compare well to arts that are more combat results oriented in their philosphy. Even if we restrict ourselves to similar gentlmen arts, a jo has the advantage of reach and can strike from multiple sides of the weapon, naginata has greater reach and a wider range of targets.
So, if you're comparing people of equal skill levels, it's really not a surprise to see a kendoka lose to a jodoka or naginataka.

sean